New Construction / International /

V7

Information correct as of 29thJuly 2026. Please see kb.breeam.com for the latest compliance information.

Appropriate project stage to appoint a suitably qualified acoustician - KBCN0256

BREEAM requires that a suitably qualified acoustician is appointed at an appropriate stage of the project, so as to ensure that early design advice on criteria of pre-requisition is met. The aim is to ensure that costly amendments to building designs are not made as a result of late appointment of the acoustician. Ultimately, it is for the assessor to determine at what stage of the project is deemed to be appropriate for this appointment to have taken place given the project specific circumstances and procurement type.  

Approved Equivalent Roles List (AERL) - KBCN1809

BREEAM International standards are unique because of their flexibility. For International projects, Assessors can submit roles to substitute those described in the Technical Manuals. Provided that such roles are equivalent to the BREEAM specified roles, BRE Global will approve them for use in a particular country or region. The Approved Equivalent Roles List is a record of all roles that BRE Global has approved to date. The list is periodically updated to reflect recent approvals or withdrawals. Using existing approved roles Where you are using an approved role, and not the role described in the criteria in the scheme Technical Manuals, a copy of the AERL should be included as part of your evidence submission for QA. AERL versions The version of the AERL that is current at the time of registration is the one that is used for assessment. Newer versions released after this can also be used, however older versions before the registration date cannot be used. For example: if the version current at registration was v3.0, then v3.0 (or any later versions) can be used, but v2.0 (or any earlier versions) cannot be used. Proposing new roles New roles cannot be proposed if they are not of equal competency to the BREEAM requirements. Only roles which are equivalent or more rigorous than the BREEAM default roles are considered. If you wish to propose a new role which you think is equivalent in your country or region:
  1. Check what the role needs to cover by referring to the roles described in the scheme Technical Manual definition.
  2. Complete BF2599 BREEAM Approved Equivalent Roles Application Form and send this to our Technical Team via the Query Webform, adding AERL into the subject field.
The information provided to us within this form must include: We will need a few weeks to review the information (please check with us for time scales). If there is missing information, or the information is not clearly referenced, this might take longer. If successful, we will send you a revised copy of the AERL which includes the new role, and will update this for future versions of the AERL.

Areas in the public domain - KBCN0587

Where areas within the site boundary will be public domain after construction, and the design/specification has been determined by the local authority/statutory body/planning permission etc, they can be excluded from the assessment of the 'Safe Access' criteria. Evidence would be required to demonstrate that this was the case. Where the client/design team do not have control of the design of these areas, the development should not be prevented from achieving the credit.

Assessment of multiple buildings within a single BREEAM assessment - KBCN1836

Ene01, Ene02 and Wat01, which use area-weighted performance scales, must be assessed using the methodology set out below where multiple buildings are included within the scope of a single BREEAM assessment, including where: • the Similar Buildings approach is applied, in accordance with Section 4 of GN20; or • Separate buildings with a single overarching function are located on the same site, in accordance with Section 6 of GN20 (e.g. a principal building with one or more ancillary or supporting buildings). Ene01 For UK NC projects, energy models (BRUKL files) must be uploaded for each building included within the assessment. For International NC projects, the assessor must enter floor area-weighted average values for the relevant energy performance metrics for both the actual building(s) and the reference building(s), covering all buildings and applicable building uses included in the assessment. Ene02 All buildings included within the assessment must be modelled in accordance with the methodology. The energy performance score must be calculated using floor area-weighted metrics covering all buildings, and compared against a benchmark derived from a floor area weighted average of all building types included within the assessment. Wat01 For Wat01, the assessor must enter details for all water-using components across all buildings included within the assessment. The Wat01 benchmark is determined using a floor area-weighted occupancy by building type, covering all buildings within scope of the BREEAM assessment.

ASWL Process update - KBCN1756

Formerly known as the ASWL for V6 and 2016, this has been renamed as Approved Standards List (ASL) for V7. It follows a similar Excel format to the International New Construction ASWL for V6 and 2016 versions. The V7 ASL document has been updated to align with the International New Construction V7 manual.  In Version 7, we’ve introduced several updates to improve the approved standards and weightings process: 

Bamboo, cork and other non-timber forest products – Responsible sourcing - KBCN1768

Non-timber forest products, such as bamboo and cork should be responsibly sourced to minimise the environmental impacts and protect local ecosystems. However, as they are not timber or timber-based products, these fall outside the scope of the Prerequisite. Where such products are integrated into a building, they should, nonetheless, be assessed and included in the calculator under ‘Other materials’.

BREEAM Excel Tools - KBCN1755

The new BREEAM Platform now integrates all Excel-based calculator tools directly into the system for a more streamlined experience. Simply input your data, and the platform will automatically calculate and display the results.   Please note, this functionality currently applies only to BREEAM New Construction V7. 

BREEAM New Construction V7 – FAQs - KBCN1754

The FAQ webpage has been developed to provide early clarification and guidance on aspects of BREEAM New Construction Version 7 (NC V7). It is intended to address questions and highlight key changes from previous versions. Further guidance is provided within the published technical manual, and this will be supplemented by Knowledge Base Compliance Notes (KBCNs). To see the full list of FAQs, please refer to the Version 7 FAQs webpage

Capital cost reporting and LCC measured area - KBCN0438

When assessing the Capital cost reporting and the LCC credits, the area to be considered should be the Gross Internal Floor Area (GIFA), according to the below RICS definition: Gross Internal Floor Area Gross Internal Floor Area is the area of a building measured to the internal face of the perimeter walls at each floor level, which includes: And excludes: 
14.02.18 - KBCN content amended to extend the applicability to LCC and to refer to GIFA rather than GEA, to reflect current industry practice.

Capped gas supplies – Shell & core assessments - KBCN1818

If a capped-off gas supply is provided, this does not prevent credits from being awarded under criterion 1. The key requirement is that all heating and hot water systems designed or installed within the scope of works (the core services) must use non-combustion systems.

Capped gas supplies – Shell & core assessments - KBCN1818

If a capped-off gas supply is provided, this does not prevent credits from being awarded under criterion 1. The key requirement is that all heating and hot water systems designed or installed within the scope of works (the core services) must use non-combustion systems.

Car sharing – aim and principles - KBCN1510

Aim The aim of this measure is that the asset’s management establishes, promotes and administers a process which encourages building users to share private car journeys to and from work, reducing the number of cars used for this purpose. Principles A car sharing group will, generally: A car sharing group is not: The criteria do not prescribe what terms and conditions should be implemented and, whilst the above principles should generally be followed, specific arrangements may vary. Evidence and justification must always be provided to demonstrate that the above aim is met. 
21-Jul-2026 - Scheme applicability updated. Title updated for clarity and consistency.

Car sharing – calculation of priority spaces - KBCN0282

The calculation of priority spaces for car sharers should account only for the car parking capacity that is dedicated to the staff working in the building, without considering spaces for customers or visitors. Car sharing spaces should be clearly segregated from customer / visitor parking areas. 
21-Jul-2026 - Scheme applicability updated.
06-Sep-2023 - Title updated to align with naming protocol.
23-Mar-2017 - Note added clarifying requirement for segregation.

Car sharing – location of priority parking - KBCN0796

Priority spaces for car sharers need to be located in the nearest available parking area to the main building entrance or to an entrance regularly used by the car sharers. For refurbishment projects, this applies regardless of whether external works or changes to car parking areas are within the scope of works. Assigning and clearly marking out the location of priority parking spaces is a measure that can be taken by any project regardless of scope, provided there are suitable external parking areas. 
21-Jul-2026 - Scheme applicability updated. Wording expanded to clarify how KBCN applies to refurbishment projects. Title updated for consistency.
22-Sep-2022 - Applied to UK NC 2018.

Car sharing – speculative projects - KBCN0878

Setting up a car sharing group requires two parties: On this basis this measure will generally be unavailable to speculative projects, however: Green fit-out agreement If there is evidence of a legally binding agreement for a future tenant to set up a scheme, this can also be considered as meeting the intent of this transport measure. 
22-Jul-2026 - Scheme applicability updated. Title updated for clarity. New text added on green fit out agreements.

Changes to CCS – May 2026 – For BREEAM V7 - KBCN1873

In response to the 2026 update to the Considerate Constructors Scheme (CCS), the equivalent CCS score requirements for achieving credits are set out in the orange columns of the table below. Credits will be awarded based on the site’s average performance across all visits, as reported on the final certificate. Where a project has received site inspections under both the previous and updated versions of the CCS scheme, the higher score may be used to determine credit achievement. For example, where a project achieved an Excellent rating under the 2022 CCS scheme but a Very Good rating under the 2026 CCS scheme, the higher (Excellent) rating can be used. This approach ensures that projects are not disadvantaged during the transition between CCS versions. Whilst the platform is being updated to include the new CCS percentage scores within the question drop-downs, please select the equivalent CCS 2022 Scheme score to award credits.

Clarification of ‘Embodied carbon benchmark comparison’ - KBCN1819

The embodied carbon benchmark comparison must always be based on the latest appropriate LCA stage that corresponds to the BREEAM assessment stage being pursued. The purpose of the benchmark comparison is to assess outcome-based embodied carbon performance, using data that is representative of the building at the relevant assessment stage.

Assessment stage requirements

Interim (Design Stage) BREEAM assessments

Final Post-Construction Stage (PCS) BREEAM assessments

If a PCS LCA is not undertaken, benchmark comparison credits cannot be awarded at final assessment, regardless of whether a technical design LCA was previously completed. This aligns with wider industry frameworks (e.g. RICS WLCA v2 and the UK Net Zero Carbon Buildings Standard), which anchor performance claims to as-built outcomes.

Considerate Constructors Scheme – International projects - KBCN1451

Where the Considerate Constructors Scheme is available outside the UK, this can can be considered as a 'BREEAM compliant' scheme for the purposes of this Issue.

Daylight – Shading devices - KBCN1815

If any of the assessed spaces are expected to contain moveable shading device (such as blinds), then a dynamic modelling of their use should be included in the calculation for options 2 and 3, consideration should be made to the shading guidance in EN 17037 or IES LM-83-23, respectively. Option 1 does not have to include dynamic modelling of moveable shading devices. This will be updated in the next re-issue of the new construction version 7 schemes.

Definition of concourse - KBCN0386

A concourse is an open area within or in front of a public building which is used primarily for circulation, short term waiting, or incidental interaction, analogous to the concourse of a train station. It should not be considered occupied space.  

Definition: cafe, canteen, catering kitchen, restaurants, bars - KBCN0691

For the purposes of the Acoustic Performance credit: Informal cafés or canteen areas, catering kitchens are generally services provided by an organisation such as a college, factory, or company for it's students or staff. Restaurants are places where food are served to the public on the premises. Compared to the examples above, restaurants can be independent and not ancillary, as per the BREEAM definition and scope. Bars are establishment where soft drink/alcohol and sometimes other refreshments are served. They might be on their own or ancillary to other functions, e.g. hotels.

Early design phase LCA submission – Modified planning applications - KBCN1893

Requirement  In the Mat 01 Methodology, M1.2 requires the early design phase LCA to be completed and submitted to BREEAM within 20 working days of submission of the planning application.  Intent  This requirement is in place to ensure that the LCA is carried out during the early design stages and can meaningfully influence material selection and key design decisions, before the planning application fixes significant aspects of the external specification.  The timeframe of 20 working days post-planning submission is a concession to allow project teams to collate the LCA evidence for submission to BREEAM.  Submission of the planning application  In this context, this is the application that specifies and fixes the external products and materials that are considered in the LCA. By default, this is considered as the first application.  However, it may also be:  Where the requirement is applied to a supplementary or replacement application, the project team must provide additional evidence to demonstrate that the intent is met.  Additional evidence 

Electric Vehicle (EV) Charging – Shared Parking for New Buildings, Extensions, and Phased Developments - KBCN1827

The required number of EV charging points must be based on the total number of parking spaces that serve the assessed building. This total includes both existing spaces and any new spaces associated with the project. Where parking is shared across a wider site, the “associated” number of spaces refers to the amount of parking the assessed building is expected to rely on for its occupants. A proportional allocation calculation must be used to determine this number. Example: If a project sits on a site with 1,000 shared spaces but the new building’s occupancy requires only 100 spaces, the EV requirement is calculated based on 100 spaces, not the full 1,000.
 
  1. General Requirements
    • Defining the parking that counts. Use a proportional allocation method to determine how many spaces in a shared car park are associated with the project.
    • Short-stay exclusion: Short-stay spaces with a maximum stay of 15 minutes (e.g., pick-up/drop-off bays) are excluded from the EV calculation.
    • EV Charging points location: EV charging points should be installed as close as possible to the building’s main entrance to ensure convenient access for the building users.
    • Existing infrastructure: Existing EV charging points in a shared car park can only be counted when:
      • They exceed the BREEAM requirement for the buildings they were originally installed to serve,
      • They meet current BREEAM requirements, and
      • They form part of the new project’s allocated parking.
    • No “legacy” exclusions: Existing parking spaces cannot be excluded simply because they predate the BREEAM assessment. If the spaces serve the assessed building, they are in scope.
    • Operational policy. It is recommended, but not mandatory, that building management implement operational measures (e.g., signage, permits, digital access controls) to help ensure that EV spaces are used by the intended building users.
  2. New Buildings on a Site or Extensions
    • Calculation basis for new buildings or extensions, EV requirements must be based on the total parking demand associated with the project, including both existing associated spaces and any new spaces created.
    • Proportional allocation formula
      • Determine the project’s share of the total site parking using either GIA or occupancy.
      • Allocated project parking = Total site parking × (Project GIA ÷ Total GIA), OR
      • Allocated project parking = Total site parking × (Project occupancy ÷ Total occupancy)
  3. Phased Development
    • Current Phase: The EV calculation should be based on the parking demand of the phase under assessment, including the existing infrastructure and any new parking spaces delivered in that phase.
    • Existing Infrastructure: EV charging provision installed in previous phases may count towards compliance where it meets the required threshold for the current phase
    • Future Phases: Provisions in future phases may be counted only if secured by a legally binding commitment (such as a signed contract or planning obligation) with a confirmed delivery timeline.

Elemental LCC and options appraisal timing - KBCN1889

The elemental LCC should be undertaken as part of the strategic options appraisal process and used to inform the selection of significant building elements and systems, such as the structure, envelope and building services. Completing the options appraisal after key design decisions have been finalised may reduce its effectiveness and limit the opportunity for the findings to influence the final design. However, the timing requirement can still be met, where the assessor agrees that there is a justification for the appraisal continuing into early RIBA Stage 3 (or equivalent), and clear evidence to demonstrate that: In all cases, the outline elemental LCC plan and identification of relevant project options must be completed by the end of Concept Design

Emissions from construction products – Re-used and reclaimed products - KBCN1869

The Emissions from construction products criteria in BREEAM are intended to apply to newly manufactured construction products and materials. Where a construction product can be robustly identified as previously used and is re-used or reclaimed, it may be considered as outside the scope of the Emissions from construction products criteria. However, any new coatings, finishes, adhesives, sealants, or other chemical treatments applied for the product’s installation must be considered and assessed separately, where relevant.

Emissions from products – earlier versions of AgBB standard - KBCN0655

Guidance Note GN22 lists the standard AgBB (2015) as a recognised scheme for emissions from building products for pre-December 2015 launched BREEAM schemes. Previous versions of the AgBB scheme are not listed as recognised schemes because earlier versions of AgBB did not include any requirement for the testing of Formaldehyde. If an earlier version AgBB has been used, further evidence will be required to provide additional information on the required Formaldehyde testing. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Emissions from products – French regulations and Category 1A/B carcinogen emission limits - KBCN0741

As highlighted in Table 1 of BREEAM Guidance Note GN22, for certain product types, the French VOC regulation ('Arrêté du 19 avril 2011 relatif à l’étiquetage des produits de construction ou de revêtement de mur ou de sol et des peintures et vernis sur leurs émissions de polluants volatils') can be used to demonstrate compliance with the VOC emissions from building products requirements in pre-December 2015 launched BREEAM schemes. The emissions from building products criteria were significantly updated for the BREEAM International New Construction 2016. Unfortunately the 2011 French VOC regulation does not meet the updated performance requirements for post-November 2015 BREEAM schemes for the following reason. The updated BREEAM requirements require testing for Category 1A and 1B carcinogens (defined as “Carcinogenic compounds detectable by the VOC emission testing requirements in Table 1 and Table 2 and that are classified as category 1A or 1B carcinogens in Annex VI to Regulation (EC) No. 1272/2008 on classification, labelling and packaging of substances and mixtures, which are listed as Carcinogenic VOCs in Annex G.2 of prEN 16516 (draft)"). Annex G.2 of prEN 16516 (draft) lists a total of 57 carcinogenic substances. The 2011 French VOC regulation does not contain any requirements to test for any of these substances. BREEAM is aware of a 2009 French VOC regulation ('Arrêté du 30 avril 2009 relatif aux conditions de mise sur le marché des produits de construction et de décoration contenant des substances cancérigènes, mutagènes ou reprotoxiques de catégorie 1 ou 2') that contains performance requirements for category 1A or 1B carcinogens; however these only cover two substances in Annex G.2 (trichloroethylene and benzene). While BREEAM does not expect all of the substances in Annex G.2 to be analysed by a regulation or testing regime, we do expect more than two. Additionally only the A+ label would meet the updated BREEAM performance requirement for TVOC of 1.0 mg/m³ and only the A and A+ labels would meet the updated BREEAM performance requirement for formaldehyde of 0.06 mg/m³. As such, additional evidence would need to be provided to confirm French VOC regulation A+ labelled products are compliant with the BREEAM International New Construction 2016 performance requirements for category 1A and 1B carcinogens. As such, additional evidence would need to be provided to confirm French VOC regulation A+ labelled products are compliant with the BREEAM International New Construction 2016 performance requirements for category 1A and 1B carcinogens, (see also KBCN1280). 
10-Oct-2022 - Title clarified, and amended to align with standard KBCN naming format for clarity and consistency. Made applicable to International NC V6.
26-Apr-2019 - Final paragraph and cross-reference to KBCN1280 added.

Emissions from products – scope of assessment - KBCN0212

General This issue covers any product installed or applied inside the inner surface of the building’s infiltration, vapour or waterproof membrane. Where this membrane is not present, it applies to the inside of the building envelope’s interior-facing thermal insulation layer. Only products that are installed or applied in parts of the building where their emissions are likely to affect indoor air quality need to be assessed. Paints and coatings Any decorative paints and varnishes that occupants are exposed to should be assessed. This is likely to include paints and coatings applied to walls, ceilings, floors, doors, etc. Whole products A finish applied to a product in the factory is assessed as a whole product, and not separately as a paint or coating. For instance, a wood panel has a finish applied in the factory. The whole panel, including all the elements that make up that panel, would need to comply with the requirements set for wood panel products in this issue. The finished product as a whole must meet the performance requirements / emission limits set in the manual. 
30-Oct-2025 - Applicable to HQM V6 and UKNCR V6.1
11-Oct-2022 - Title amended for clarity and consistency. Content merged with KBCN0871.
10-Oct-2022 - Wording simplified. Scheme applicability updated.
16-Jun-2017 - Title and general principle amended to extend the applicability of the KBCN to all finishes. Paints specified for specialist applications covered in KBCN0872.
 

Emissions from products – specialist paints and coatings - KBCN0872

Where a paint or coating falls within: then the paint or coating must be assessed. Specialist paints and coatings are exempted from meeting the VOC content and emission limits where there are no alternative products available that can perform the function, and still meet the emission limits. This must be clearly evidenced. 
30-Oct-2025 Applicable to HQM V6 and UKNCR V6.1
02-Oct-2025 Reference to 'VOC content' added and KBCN applied to UKNC V7 and INC V7 to clarify CN2.1 
27-Oct-2022 Wording clarified. New compliance principle added from UKNC V6.
10-Oct-2022 Title amended for clarity. Scheme applicability updated.
13-Mar-2020 KBCN amended to clarify exceptions and applicability.
16-Jun-2017 Content merged with KBCN0212.

Emissions from products – Recognition of carcinogen classifications from non-EU schemes - KBCN1879

Where BREEAM material emission criteria reference Category 1A and Category 1B carcinogens, these classifications are based on the EU CLP Regulation. However, where a certification scheme or testing body does not work directly to EU CLP classifications, other recognised authoritative carcinogen classification systems may be accepted as an alternative basis for carcinogen identification. This can include: • International Agency for Research on Cancer (IARC) • California Office of Environmental Health Hazard Assessment (OEHHA)

ERRATUM – Enhanced Amenities - KBCN1817

The wording and approach to assessing ‘enhanced’ amenities in the technical manual is incorrect. The Aim of this assessment issue is, ‘To maximise the potential for people to choose public, active and lower-emission private transport by providing the site with convenient, sustainable options.’ In line with this intent, an ‘enhanced amenity’ should be referred to as an additional amenity, as it must provide an additional compliant amenity resulting from the development. If a development provides an amenity to replace an existing amenity, regardless of whether there is a qualitative enhancement or change of amenity type, this must be considered as an existing amenity. Furthermore, an additional amenity provided by the development may only be considered as such where there is a net increase in the number of compliant amenities resulting from the development. The updated guidance can be found below:   Option 10 - Additional amenities: Provide compliant additional amenities within less than or equal to 500 m of the building entrance. M4.2: Additional amenities Two or three points can be awarded for providing additional amenities ≤ 500 m via a safe pedestrian route. If additional amenities duplicate the services provided by existing amenities, this is still recognised. This is because duplicate amenities still create additional choices for users in terms of services offered and location. If a development provides an amenity to replace an existing amenity, regardless of whether there is a qualitative enhancement or change of amenity type, this must be considered as an existing amenity. A new amenity provided by the development may only be considered as ‘additional’ where there is a net increase in the number of compliant amenities resulting from the development. 2 points: at least one additional amenity 3 points: two or more additional amenities This will be updated in the next reissue of the technical manual.

Erratum – INC V7 Hea10 Natural hazards – CN3 - KBCN1833

CN3 incorrectly states- ‘Where flooding is the only risk identified, this issue will  not be included in the assessment as flooding is addressed in Pol03 Flood and surface water management on page 381’ It should say - ‘Where flooding is the only risk identified, Criterion 2 is not applicable as flood mitigation is addressed in Pol03 Flood and surface water management on page 381’. Criterion 1 must still be achieved where ‘Natural hazards’ has a >0% BREEAM weighting for the country/region. This can be viewed in the ‘Scoring and output’ section of the assessment. If a risk assessment has been carried out and it identifies that flooding is the only risk – choose ‘Yes’ to all questions under this issue to award the credit.   The technical manual and the platform will be updated accordingly in the next re-issue.

Erratum – Monitoring utility consumption – Meeting the set targets - KBCN1899

The target and actual total energy and water consumption figures must be entered into the platform. However, meeting the targets is not required for compliance. The relevant criteria will be clarified in the next reissue.

Erratum – NCV7 – Ene 08 Installed controls - KBCN1812

There is a printing error in the following: UKNC V7 Ene 08 Table 6.18 INC V7 Ene 08 Table 43 The correct options for Installed controls for space heating are:
Control type Control functionality Points awarded
Heat generator output – heat pumps Multi-stage control (e.g. several on/off compressors) 1
Variable control (e.g. hot gas bypass, inverter frequency control) 2
  The technical manual will be updated accordingly in the next re-issue.

Erratum – NC V7 – Ene 07 Flexible demand response - KBCN1876

This applies only to the UKNC V7.0 and INC V7.0 manuals. There is an error in the following: UKNC V7.0.0 Ene 07 Table 6.16 INC V7.0.0 Ene 07 Table 41 The corrected table is below:
Systems present  Points available  Flexible demand capability  Points awarded 
Electric space heating 1 Operation can be optimised based on signals from the electricity supplier or local renewable sources. 1
Electric space cooling 1 Operation can be optimised based on signals from the electricity supplier or local renewable sources. 1
Electric domestic hot water 1 Operation can be optimised based on signals from the electricity supplier or local renewable sources. 1
Electric vehicle charging points 2 Charging with one-way control based on signals from the electricity supplier or local renewable sources. 1
Charging with two-way control based on signals from the electricity supplier or local renewable sources. 2
Other systems or equipment with flexible demand capability 1 Installed 1
Battery energy storage 3 Installed battery energy storage with no flexible demand response capability. 1
The installed battery energy storage system is only capable of charging based on signals from the electricity supplier or local renewable sources. 2
The installed battery energy storage system is only capable of feeding electricity back into the grid. 2
The installed battery energy storage system is capable of both charging and feeding electricity back into the grid, based on signals from the electricity supplier or local renewable source. 3
  The technical manual will be updated accordingly in the next re-issue. The scoring for the Ene 07 calculator in the platform aligns with the above corrected table.

ERRATUM – Scope – Mixed-use developments and building types - KBCN1820

The wording and approach set out for assessing mixed-use developments in the technical manual is incorrect. Developments comprising of separate buildings with different function types cannot be assessed under a single assessment, unless they meet the conditions for Section 6 of GN20 (Separate buildings with a single, over-arching function). The updated guidance can be found below: Mixed-use developments and building types BREEAM defines different criteria and benchmarks for some assessment issues according to building type, function and use. A single building that includes different functions areas, e.g. office and retail, can be assessed under a single BREEAM assessment. Each area will need to comply with the relevant criteria for the building type. BREEAM credits that are awarded based on performance scales, such as Ene 01, Ene 02, Wat 01 and Mat 01, will be calculated on an area weighted basis. Buildings that are a mix of commercial and residential asset types, and developments which comprise of separate buildings with different function types, will need separate BREEAM assessments. Further guidance can be found in Guidance Note 20.

ERRATUM – Scope – Mixed-use developments and building types - KBCN1820

The wording and approach set out for assessing mixed-use developments in the technical manual is incorrect. Developments comprising of separate buildings with different function types cannot be assessed under a single assessment, unless they meet the conditions for Section 6 of GN20 (Separate buildings with a single, over-arching function). The updated guidance can be found below: Mixed-use developments and building types BREEAM defines different criteria and benchmarks for some assessment issues according to building type, function and use. A single building that includes different functions areas, e.g. office and retail, can be assessed under a single BREEAM assessment. Each area will need to comply with the relevant criteria for the building type. BREEAM credits that are awarded based on performance scales, such as Ene 01, Ene 02, Wat 01 and Mat 01, will be calculated on an area weighted basis. Buildings that are a mix of commercial and residential asset types, and developments which comprise of separate buildings with different function types, will need separate BREEAM assessments. Further guidance can be found in Guidance Note 20.

Erratum – Wat 01 – Data requirements for Urinals - KBCN1878

Table 8.2 / Table 62: Data requirements for water-consuming components incorrectly states that the data should be entered as “Flush volume in litres/bowl/hour” for all types of urinals
Water-consuming component Data requirements
Urinals Flush volume in litres/bowl/hour
These units should only apply to urinals with a timed flush. Data for urinals with automatic flush should be entered in Flush volume in litres/flush (see below)
Water-consuming component Data requirements
Urinals with timed flush Flush volume in litres/bowl/hour
Urinals with automatic flush Flush volume in litres/flush
The data entry options and units are correct in the BREEAM Platform, and the technical manuals will be updated in the next reissue.

Evidence requirements – responsible sourcing of materials at post-construction - KBCN1599

Whilst the UK BREEAM manuals are less prescriptive in the evidential requirements to allow flexibility, to ensure consistency across the schemes, it is expected that robust evidence should be provided to verify the source of any certified materials and how the assessor has confirmed the products and manufacturers used. Evidence supplied at post construction stage must reflect the completed building and confirm the responsibly sourced materials that have been procured and installed on the project. Supporting documentation is required to validate letters of confirmation or schedules of materials. Evidence provided could include proof of purchase, for example, invoices, delivery tickets, purchase orders or correspondence from suppliers. This may be an example for each material sourced, rather than every delivery ticket for instance.  Alternatively, evidence of the use of the responsibly sourced materials may include as-built drawings, O&M documentation or site photographs. 
30-Oct-2025 - Applicable to HQM V6 and UKNCR V6.1

Flood Risk Assessment older than five years - KBCN1744

This sentence appears in the definition of 'Flood Risk Assessment': Where more than five years have passed since the FRA was carried out, evidence would be required to demonstrate that the basis of the FRA has not changed in that time. The requirement for evidence that the basis of the FRA has not changed where more than five years have passed is applicable only at Design Stage. It is not required at Post Construction Stage where a compliant FRA was undertaken at Design Stage and the development was carried out in accordance with that design.

Glare control – Venetian blinds - KBCN1867

Venetian blinds must demonstrably meet the openness factor and transmittance value for blinds, where specified within a BREEAM manual. If the specification data for Venetian blinds is not available, evidence of the two points below can be provided instead: 1. The blind slats can be fully closed and overlap so there are no gaps between them. 2. The slat material clearly transmits no light, for example solid and opaque plastic, wood or metal. If the slat material is not solid and opaque, and is for example, perforated or made from woven fabric, the openness and transmittance values must be demonstrated in line with the criteria.

Glare control – Modelling - KBCN1800

The ‘Glare control’ criteria do not require a specific methodology to be used to identify areas at risk of glare, and in most situations, a simple solar path analysis would be suitable. Alternatively, detailed hourly modelling methods, such as DGP and ASE, may be more appropriate. However, in either case, compliance cannot be assumed. Regardless of the methodology used, the modelling must be supported by robust reporting to demonstrate that each aspect of the criteria has been met.

GN06 Indoor air quality plans - KBCN0618

Latest version: v2.3, July 2026 Guidance Note 6 (GN06) provides guidance to assessors and project teams regarding the content and rigour of an Indoor Air Quality Plan (IAQP) as required by the indoor air quality criteria in BREEAM New Construction and BREEAM Refurbishment and Fit Out. It should not be interpreted as BREEAM criteria. It is intended to provide assessors and project teams with further, flexible information and guidance regarding the rigour, content, and tasks of an IAQP. Download Guidance Note 6 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
15-Jul-2026 - Updated version released (v2.3)

GN18 BREEAM Recognised Responsible Sourcing Certification Schemes and BREEAM Scheme Applicability - KBCN0723

Latest version: v3.7, May 2023 BREEAM awards credits for responsibly sourcing construction products (typically under the Mat 03 issue) to encourage responsible product specification and procurement in construction. To achieve these credits, applicable specified products (as listed in the relevant technical manual) must be covered by an Environmental Management System (EMS) or a responsible sourcing certification scheme (RSCS) recognised by BREEAM. Guidance Note 18 (GN18) lists the responsible sourcing certifications schemes recognised by BREEAM along with the relevant summary scores to be used in BREEAM assessments. Download Guidance Note 18 Download Guidance Note 18 v2.0 (licensed assessors only - optional for projects registered prior to release of v3.0 in September 2016) View all Guidance Notes on BREEAM Projects (licensed assessors only) 
21-Jul-2026 - Applicable to NC V6, NC V7, RFO V7

GN20 Assessing mixed-use and multiple buildings – BREEAM V7 - KBCN0717

Latest version: v1.1, July 2026 Guidance Note 20 (GN20) provides information to help BREEAM Assessors formulate an assessment strategy for mixed-use developments, assets that include different levels of fit out, and for multiple buildings or units on the same site using BREEAM V7. This guidance note only applies to BREEAM V7. There is a separate guidance note for earlier versions of BREEAM NC and RFO (see Guidance Note 10). Download Guidance Note 20 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
15-Jul-2026 - Updated version released (v1.1)

GN22 Recognised schemes for emissions from construction products - KBCN0719

Latest version: v3.2, July 2026 Within the Health and Wellbeing category of several BREEAM schemes, credits are awarded for specifying materials that minimise emissions from building products of formaldehyde and volatile organic compounds (VOCs). The criteria involve meeting emission level performance requirements in accordance with compliant performance and testing standards. Guidance Note 22 (GN22) lists schemes that show equivalent or better performance than the current BREEAM and HQM criteria and therefore can be used to demonstrate compliance with the criteria. This document should be read in conjunction with the relevant assessment issue guidance provided in the appropriate BREEAM or HQM technical manual. The guidance note contains two tables: Download Guidance Note 22 View all Guidance Notes on BREEAM Projects (licensed assessors only) Applying for inclusion in GN22 The list of approved schemes is based on those which have made a successful application to BREEAM. As such, there may be other operational schemes that could potentially be recognised. To be considered for inclusion, the scheme operator must complete an application form, providing full details of the scheme, and submit this to BRE Global for technical approval. A flat rate charge is payable to cover the costs of administering and reviewing the application. GN22 will be updated following the approval of any schemes via this process. The application form (BF1648) provides full details of the application process, and licensed BREEAM assessors can request a copy by submitting a technical query using the webform. Other parties may request a copy by contacting: breeam@bregroup.com 
15-Jul-2026 - Release of GN22 3.2
25-Mar-2026 - Release of GN22 3.1
30-Oct-2025 - Applicable to HQM V6 and UKNCR V6.1
25-Sep-2025 - Updated to provide details of the approval process and title updated.
30-Jan-2025 - Release of GN22 3.0
30-Sep-2024 - Release of GN22 2.9
01-Feb-2024 - Release of GN22 2.8
31-Jan-2023 - Release of GN22 2.7
10-Oct-2022 - This KBCN merged with KBCN0646. Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.
25-Jan-2019 - Link to Guidance Note updated
12-Mar-2018 - Link to Guidance Note updated

GN24 Demonstrating compliance with responsible sourcing requirements in BREEAM - KBCN0721

Latest version: v1.2, July 2026 Guidance Note 24 (GN24) provides additional guidance to assessors and specifiers on demonstrating compliance with the 'Measuring responsible sourcing' criteria in BREEAM (typically in Mat 03). It should be read in conjunction with the Technical Manual for the relevant assessment scheme. It covers: Download Guidance Note 24 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
15-Jul-2026 - Updated version released (v1.2)

GN41 Reporting template for ecology assessment issues – BREEAM V7 - KBCN1748

Latest version: v0.0, July 2025 Guidance Note 41 (GN41) is an optional template to help Assessors relate information generated during a project to the latest ecology assessment issues in BREEAM NC V7. This is a new template for V7. There is a separate reporting template for previous versions of BREEAM UK NC, BREEAM UKNCR, and HQM (see Guidance Note 40). Download Guidance Note 41 View all Guidance Notes on BREEAM Projects (licensed assessors only)

GN49 International Ene 01 calculation methodology guidance - KBCN1749

Latest version: v0.0, July 2025 Guidance Note 49 (GN49) gives background information on the methodology for determining the number of credits achieved for energy performance under the Ene 01 assessment issue for BREEAM International NC V7. The Ene 01 methodology uses a triple metric approach that addresses energy demand for heating and cooling, primary energy consumption, and carbon dioxide emissions. The aim of using this approach is to minimise the energy consumption and carbon emissions from regulated energy uses and to maximise the use of low carbon energy sources. Guidance Note 49 also includes the adjustment factors that are applied to uplift the reference metrics in Ene 01 for BREEAM International NC V7. It describes the methodology for determining the factors and the application process to have a country’s adjustment factor added or updated. Download Guidance Note 49 View all Guidance Notes on BREEAM Projects (licensed assessors only)

GN50 Natural light calculation methodology for Hea 01 in BREEAM V7 - KBCN1683

Latest version: v1.0, July 2026 Guidance Note 50 (GN50) describes the calculation methodologies that underpin the natural light issue (Hea 01) within BREEAM V7. Guidance is provided for methodologies relating to the daylight criteria and the evaluation of glare from daylight criteria. All the calculation methods outlined in the technical manual for these criteria are described in this guidance note. Download Guidance Note 50 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
15-Jul-2026 - Updated version released (v1.0)

GN51 Guidance on LCA and embodied carbon calculations for Mat 01 in BREEAM V7 - KBCN1684

Latest version: v1.0, July 2026 Guidance Note 51 (GN51) provides supporting information for the new Mat 01 criteria in BREEAM V7. Its development is driven by the introduction of new credit allocation criteria for Mat 01. While the core principles of measuring and reporting a building's environmental performance through life cycle assessment (LCA) and benchmarking were introduced in BREEAM UK New Construction 2018, significant revisions have been made to align the criteria across BREEAM schemes and with existing LCA frameworks and methodologies. This guidance note explains the primary methodology for Mat 01, including minimum requirements and the scope of the LCA. Download Guidance Note 51 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
15-Jul-2026 - Updated version released (v1.0)

GN53 Energy modelling and predicted operational energy performance score in Ene 02 - KBCN1751

Latest version: v0.2, February 2026 Guidance Note 53 (GN53) provides guidance for the predictive energy modelling and predicted operational energy performance score credits within Ene 02, detailing the input process for the issue’s operational energy calculator. Download Guidance Note 53 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
16-Feb-2026 - Updated for release of GN53 0.2

GN54 Responsible construction management – BREEAM V7 - KBCN1752

Latest version: v1.0, July 2026 Guidance Note 54 (GN54) provides information on achieving the responsible construction management requirements in Man 03 in BREEAM V7. It has two parts: This guidance note only applies to BREEAM V7. There is a separate guidance note for earlier versions of BREEAM UK NC and UKNCR (see Guidance Note 33). Download Guidance Note 54 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
15-Jul-2026 - Updated version released (v1.0)

Hotels and other short stay accommodation – cycle storage unit of measure - KBCN0676

The cycle storage requirement for hotels and other short‑stay accommodation is 1 space per 10 staff. Guests or visitors staying at the hotel are excluded from the calculation. Where a hotel includes on‑site facilities such as conference spaces, restaurants, or gyms, visitors to these facilities should also be included in the cycle-storage calculation: 1 space per 10 guests. Specific Note for Refurbishment and Fit Out International 2015 Table 36 in the technical manual incorrectly refers to “1 staff and 1 visitor, or 1 bed.” Please ignore this error and follow the guidance above. 
16-Feb-2026 - Wording update to be applicable across multiple BREEAM Schemes
20-Oct-2025 - Guidance clarified and updated to align with all current BREEAM scheme guidance.
23-Jul-2018 Wording added to include clarification on what to base the calculation of cycle spaces on.
Technical manual to be updated accordingly in next re-issue.

Inclusive and accessible design (non-residential only) - KBCN0863

Shared and accessible facilities are applicable where relevant. For office, retail and industrial buildings, if there are no spaces suitable to be shared with members of the public or community, this can be justified and the ‘inclusive and accessible design’ credit met by demonstrating compliance with the other criteria. Commercial buildings are unlikely to provide spaces that are suitable to be shared with members of the public/community.

Independent third party – clarification on the definition - KBCN1805

For the purposes of BREEAM, sister companies or parent companies cannot be considered as third parties.  To be classed as an independent third party, there must be no professional connection or relationship between the LCA consultant/energy assessor, or their company, and the verification body. The third-party verifier must be independent of the LCA or energy assessor and demonstrate impartiality (for general principles, see ISO 17029). To qualify as a third party, the verifier must belong to an organisation not involved in the project and must not provide advice to the project, as this could compromise their impartiality during verification.

Individual and communal catering – Residential institutions   - KBCN1898

The criteria set different requirements for the following scenarios:  In situations where there is catering equipment within self-contained dwellings or bedsits and additional communal catering facilities, recyclable waste storage must be provided in both.  However, to avoid over-provision, the size of individual containers and total volume of waste storage can be reduced by up to 50% in either the dwellings or the communal kitchens.   The approach must be justified based on the project team’s assessment of the likely waste streams, accounting for the type, location and number of catering facilities provided. 

Indoor air quality plan – scope - KBCN0294

Where possible, the indoor air quality plan must cover all items in the criteria. This means the plan must be completed for: Within these requirements, there is flexibility for the design team to use their professional judgement to determine what is appropriate to meet the criteria. Any exclusions must be clearly evidenced and justified. As the basis for effective asset management, the indoor air quality plan must be written in a consistent and comprehensive manner. The report must address relevant aspects as fully as possible within the scope of the development. 
11-Oct-2022 Title updated for clarity. Wording clarified. Content merged with KBCN0556. Reference to KBCN1544 added. Scheme applicability updated.

Knowledge Base – Applicability of existing guidance to NC V7 - KBCN1757

We are in the process of undertaking a comprehensive review of existing guidance on the Knowledge Base for BREEAM New Construction to determine its applicability to New Construction Version 7, and the Knowledge Base will be updated in due course. In the meantime, if you wish to apply for a previous KBCN, please review the changes outlined in the Summary of Changes and compare the criteria in the technical manuals. If the criteria are the same, and you are satisfied that a previous New Construction KBCN is relevant to NC V7, you can follow this guidance. If there are differences in the New Construction V7 criteria, but you believe an existing KBCN can be applied, please submit a technical query on the webform to confirm this.

LCC – Competent person or Suitably Qualified Cost Consultant (SQCC) - KBCN1803

The definition of a competent person, or SQCC as named within HQM or BREEAM New Construction Residential, has been updated to provide further clarification and is now defined as set out below: An individual achieving all the following items can be considered to be ‘suitably qualified’ for the purpose of completing the LCC credits:
  1. Holds a recognised qualification for undertaking life cycle costing studies and/or a degree/postgraduate diploma or equivalent qualification in quantity surveying, construction economics or other construction-related subject.
  2. Has acquired substantial expertise through a minimum of three years relevant experience (within the last five years). The experience must clearly demonstrate a practical understanding of life cycle costing in construction and the built environment and show an ability to identify and demonstrate cost and performance enhancement measures.
  3. Is not professionally connected to a single manufacturer
A CV should be provided demonstrating their experience and knowledge against the above requirements. Note for Non-Domestic New Construction V7: The intention of the above is to provide clearer guidelines for assessors on who would be considered a suitable professional to carry out LCC option appraisals. For New Construction V7.0, flexibility may be applied, and the definition can be considered to be met where point 3 and either point 1 or 2 of the above is demonstrated. In addition, where it can be demonstrated that the LCC consultant was appointed prior to the release of KBCN1803 (18.10.2025), and that appointment was made based on the assessor’s professional judgement of what constitutes ‘recognised qualification’ and/or ‘substantial expertise’ at that time, similar flexibility may be applied. In such cases, sufficient justification and supporting evidence (e.g. CV and rationale for appointment) must be provided to demonstrate that the consultant was reasonably considered competent in line with the intent of the criteria at the time of appointment. The definition will be updated in the next release of the technical manual (V7.1); therefore, any assessments under New Construction V7.1 and subsequent versions will need to meet all three requirements, and no such flexibility will apply. 
26 May 2026: Note added regarding application against NC V7.

Leak detection – compliance principle – alternative technologies - KBCN1566

Where it can be demonstrated that alternative leak detection technologies can meet or exceed the capabilities of systems set out in the BREEAM guidance, subject to approval, these can also be considered compliant. It is the role of the Assessor and the project team to provide evidence and justification in a compliance principle query (see KBCN1555). The following alternative solutions are currently recognised: 
06-Jul-2026 - Title updated for consistency. Scheme applicability updated. Principle also applied to refrigerant leak detection.

Leak detection – using a BMS - KBCN0439

A BMS can be used for leak detection if it can be shown that its integrated or add-on features meet all the requirements for a leak detection system. 
07-Feb-2022 - Applicability to BIU V6C confirmed.
06-Jul-2026 - Scheme applicability updated, and applied also to refrigerant leak detection across all relevant schemes.

Legally harvested and traded timber – Examples - KBCN0956

The following examples are considered compliant for BREEAM: Legally harvested:
  1. Evidence of compliance with the UK government Timber Procurement Policy (see here, timber bought inside the UK only)
  2. FSC, PEFC, SFI or GiB certification
  3. Evidence of compliance with the EUTR (timber bought inside the EU only)
  4. Risk assessment/due diligence documentation demonstrating a low risk of non-compliance with the ‘legally harvested’ requirements given in the manual.
Legally traded:
  1. Evidence of compliance with the UK government Timber Procurement Policy (see here, timber bought inside the UK only)
  2. FSC, PEFC, SFI or GiB certification
  3. Risk assessment/due diligence documentation demonstrating a low risk of non-compliance with the ‘legally traded’ requirements given in the manual.
04-Dec-2025 - Examples updated to include Grown in Britain (GiB) certification. Previous reference to 'CPET' clarified as 'UK government Timber Procurement Policy'.
KBCN applied more widely to all relevant scheme issues in BREEAM and HQM

Life Cycle Assessment – Similar buildings approach (GN20 – Section 4) - KBCN1834

Where multiple buildings are included within the scope of a single BREEAM assessment following the Similar Buildings approach, in accordance with Section 4 of GN20, unless identical, each building must be assessed and reported separately within the LCA.   Where all buildings are demonstrably identical in design and specification (and differ only in scale), a representative LCA approach may be used (see KBCN1890). Shared elements (e.g. substructure, external works, or building services serving multiple buildings) may be apportioned between buildings using a reasonable and transparent method (e.g. by gross internal area or other appropriate project-specific metric), in line with recognised industry approaches. For the purposes of BREEAM benchmarking under Mat 01: • The results submitted to the platform must represent a single building, not a combined site-wide result. • Where multiple buildings are included within an assessment, the worst-performing building (in kgCO₂e/m²) must be used for benchmarking in line with the Similar Buildings methodology (section 4.2 of GN20). Full evidence must be provided to demonstrate: • That all buildings within scope of the assessment have been included, with individual LCAs completed for each building, and • How results have been separated and, where relevant, how shared elements have been allocated.
Rationale: In line with Section 4.2 of GN20, BREEAM issues must be assessed for each individual building, with credits awarded based on the worst‑performing building for each assessment issue. The Similar Buildings approach therefore remains an individual‑building assessment methodology and does not constitute a site‑wide assessment, even where multiple buildings are included. 
09.07.2026 Reference to KBCN1890 added

Life Cycle Assessment for multiple buildings within a single assessment (GN20 – Section 6) - KBCN1835

Where a BREEAM assessment includes multiple buildings on the same site with a single, over-arching function, in accordance with Section 6 of GN20 (e.g. a principal building with one or more ancillary or supporting buildings), and where these are not classified as ‘similar buildings’, each building must be assessed and reported separately within the LCA. A single aggregated result for the whole site is not sufficient on its own, even where a single coordinated LCA model is used. Shared elements (e.g. substructure, external works, or building services serving multiple buildings) may be apportioned between buildings using a reasonable and transparent method (e.g. by gross internal area or other appropriate project-specific metric), in line with recognised industry approaches. For the purposes of BREEAM benchmarking under Mat 01: • The results submitted to the platform must represent a single building, not a combined site-wide result. • Where multiple buildings are included within an assessment, benchmarking (in kgCO₂e/m²) must be based on the principal building. Where no clear principal building exists, the largest building should be used. Full evidence must be provided to demonstrate: • That all buildings within scope are included, with individual LCAs completed for each building, and • How results have been separated and, where relevant, how shared elements have been allocated.
Rationale: Industry standards such as RICS guidance and the UK Net Zero Carbon Buildings Standard define assessment boundaries at the building (asset) level, while allowing aggregation at project level only where individual building results are also reported. Requiring building-level results ensures consistency with industry practice, maintains comparability with BREEAM benchmarks, and avoids distortion where multiple buildings are combined into a single result. 
Note: This approach applies until further platform functionality is available to support multi-building submissions directly.

Life Cycle Assessment – Similar buildings with identical design (GN20 Section 4) – Representative LCA approach - KBCN1890

Where multiple buildings are substantially identical in design, construction and specification, and any differences are limited to scale, a representative LCA approach may be used instead of completing a full LCA for every building. Where buildings are not substantially identical, see KBCN1834. For the purposes of BREEAM benchmarking under Mat01: Demonstrating representativeness does not require full LCAs for additional units; proportionate methods such as parametric scaling of quantities or elemental intensity comparisons may be used to evidence that variation in normalised results is not materially significant. Where there is uncertainty regarding representativeness, a secondary check model for an additional unit is recommended to verify consistency of results.
Rationale: The representative LCA approach provides a proportionate means of assessing developments containing multiple highly similar buildings while maintaining confidence that reported results are representative of individual building performance. It is intended as a limited exception to the standard requirement for building-specific assessment.

Meeting the minimum standard requirement – compliance when chain of custody is broken - KBCN1816

Where there is a broken chain in the last link between the purchase and delivery of certified timber from the supplier and the forwarding distribution of the timber to the site under assessment, such as where the timber has been delivered to a subcontractor or fabricator’s premises instead of direct to site (e.g. as part of a bulk order or where limited storage is available on site), compliance can still be achieved if a documented risk assessment confirms that there is low risk of mixing or substitution of certified and non-certified timber. Ways to demonstrate compliance: A. Verification that the subcontractor or fabricator only purchases and uses certified timber. There must be robust mechanisms in place to verify that all timber materials purchased and delivered originate from sustainably managed sources. This includes maintaining documented timber procurement policies and procedures that mandate certified timber orders and delivery checks. Comprehensive supplier details should be readily accessible for review upon request to demonstrate that all timber is certified. B. Where non-certified timber is handled/stored or sourced, that there are robust control measures in place to prevent any substitution or mixing of certified and non-certified timber at every stage of the process. Documentation demonstrating compliance should be maintained and made available upon request. Examples of appropriate control measures are listed below:
Control
Evidence required
Purchasing records All purchase orders, requisition notes, and contracts must explicitly specify the product details and confirm that materials are to originate from legal and sustainable sources.

Segregated storage of timber

 Site layout map, stock control processes and records to confirm that certified timber is stored away from non-certified timber.
Segregated delivery of timber to site - All timber must be thoroughly inspected and verified before shipment to confirm that it is correctly marked/labelled as FSC/PEFC-certified. - Delivery notes must be accurately maintained. - A second-party verification process to check tickets and stock, must be carried out upon site delivery to confirm certified status of timber.
Documentation Comprehensive documentation must enable independent assessors to trace any timber back to its sustainable source. This includes maintaining purchase records, goods-inward notices, stock records, and sales documentation such as orders and invoices.
The above is guidance and should not replace any local or national requirements for the sourcing of legally traded and harvested timber. 
1 June 2026 - Updated to apply to New Construction and RFO Schemes

No discharge for up to 5mm rainfall - KBCN0599

The criterion requires no run-off to leave the developed site into the local watercourse(s) for a storm event that results in rainfall depths up to 5mm.  It is not acceptable to collect the rainfall within an attenuation tank and allow the runoff to be released from the site at a restricted rate. This simply slows the rate at which it is released to the watercourse(s). Compliance should be based upon zero runoff from the first 5mm rainfall for 80% of events during summer and 50% in winter.  This is in line with the recommendations within Chapter 24.8 of The SuDs Manual (C753), CIRIA 2015. The 5mm rainfall event is considered one of the most common rainfall events and, therefore, a system should be designed to prevent this run-off leaving the site thus protecting a receiving watercourse from pollution. Where ground conditions prohibit the use of SuDs techniques to manage the rainfall onsite or it is not be possible for the first 5mm of rainfall to be prevented from leaving a site completely.  An appropriately qualified professional must explain comprehensively why this criterion cannot be fully met and design a system to meet the intent of this criterion as far as possible. Where this can be justified and all other relevant criteria have been achieved, the credit can still be awarded. 
16.08.2024 Clarification added on calculation requirements and text from KBCN1059 now included.

Post-construction measurement – formaldehyde / VOC levels exceed limits - KBCN0258

If the measured formaldehyde / VOC concentrations were above the prescribed limits, the appropriate remedial action must be taken, as described in the IAQ Plan. The criterion requires confirmation of 'the measures that have or will be undertaken' however it does not specifically address re-testing. We would expect, however that the IAQ Plan should outline what remedial measures are appropriate depending upon the severity and type of the non-compliance with prescribed limits. Such measures may include re-testing as a matter of 'best practice'. Where levels are found to exceed these limits, the project team confirms the measures that have, or will be undertaken in accordance with the IAQ plan, to reduce the TVOC and formaldehyde levels to within the above limits. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Post-construction measurement – sampling methodology and KPIs - KBCN0380

When testing for VOCs post-completion and pre-occupancy, a representative sample of the building needs to be carried out. Each sample TVOC and formaldehyde measurement needs to achieve the threshold levels individually, either in the initial testing or after remedial measures have been implemented. This ensures that all tested areas of the building are below the limits, and that areas of non-compliance are not ‘averaged out’. 'When providing KPI test results for air quality post-construction / pre-occupancy within scoring and reporting tool, where the limits are exceeded and remediation and re-testing are carried out, the figure should be an average for the whole building post-remediation, as this is the key figure that reflects the building at its certified state'. Where testing is not a requirement of the IAQ Plan and this is not carried out, the original testing figures should be entered and the assessment report should provide details of the remediation measures undertaken to reduce these to within the prescribed limits. 
10-Oct-2022 Title amended to align with standard KBCN naming format for clarity and consistency. Scheme applicability updated.
06-Dec-2017 Amended to account for situations where re-testing is not required by the IAQ Plan.

Prerequisite – Users with special hearing and communication needs - KBCN0969

Intent Criterion 1c ensures that the suitably qualified acoustician has influenced the design of the asset to: What this should cover will depend on the asset type and expected users. Asset users The UK Department for Education document BB93 Acoustic design of schools: performance standards building bulletin 93 (February 2015) defines users with special hearing or communication needs as those with any of the following: This list is not exhaustive, and the suitably qualified acoustician must consider typical asset users, along with the other points a-d when giving early design advice regarding room layout, sound insulation and reverberation times. Accessibility features The principles of accessible design are universal and could be applied in a wide range of assets. Additional features that could be relevant to accessible acoustic design include, but are not limited to: The suitably qualified acoustician must use their professional judgement to determine the scope of any such features as part of the design. Where no features are applicable this must be clearly justified. 
04-Sep-2024: Wording and intent clarified. Information on additional accessibility features added. Scheme applicability updated. Title updated.
01-Mar-2019: Amended to clarify that this is a 'typical' list of users, but does not impose a new requirement.

Previously developed land – development footprint - KBCN1882

When determining the percentage of the proposed development that is on previously occupied land, the whole development footprint must be considered. This is defined as any part of the development that falls within the boundary of the assessed site (buildings, hard landscaping, car parks and access roads). 
03-July-2026 Scheme applicability updated.
 

Provision of fresh drinking water – risk of contamination - KBCN0302

Mandatory requirements relating to microbial contamination must be met for all buildings, however, the provision of fresh drinking water only applies where there are relevant areas in the building types. It may be justified that the drinking water requirement is not applicable to achieve the credit.    

Quantifying change in ecological value- Biodiversity metric rules - KBCN1894

Unless otherwise stated in the BREEAM technical manual, all rules of the methodology in the relevant user guide of the biodiversity metric must be followed in order for any credits to be awarded for the biodiversity net gain calculation. This includes rules such as trading rules, unit conversions, and competency requirements.

Recognised emission certification schemes – Publicly available databases - KBCN1887

Some of the emission certification schemes recognised within GN22 maintain publicly available databases of products certified against their scheme requirements. These databases can be used to help assessors and project teams identify products that are certified under recognised schemes. Examples include: EU Ecolabel – https://environmental-data.ec.europa.eu/ecolabel/index.html GREENGUARD – https://spot.ul.com/ Indoor Advantage – https://www.scsglobalservices.com/certified-green-products-guide Nordic Swan – https://www.svanen.se/en/search-for-ecolabelled-products-and-services/?sortorder=6&producttype=0&qry=&productgroup= Blue Angel – https://www.blauer-engel.de/en eco-INSTITUT – https://www.eco-institut-label.de/en/ M1 – https://ymparisto.rakennustieto.fi/rakennusmateriaalien-paastoluokitus-etsi-m1-luokiteltuja-tuotteita Indoor Air Comfort® / Indoor Air Comfort Gold® – https://www.eurofins.com/iac-certified   Please be aware that these databases may include products that are certified under a recognised scheme, but which fall outside the product categories, BREEAM performance level, or the approved certification level recognised in GN22. Assessors must, therefore, verify that the certification scheme and product category are recognised within GN22 and applicable to the product being assessed. Please also refer to KBCN0719 - GN22 Recognised schemes for emissions from construction products

Remedial works – timing of acoustic re-testing - KBCN1164

The intent of CN "Remedial works" is that, where these are required, re-testing is carried out prior to handover and occupation. However, it is permissible to carry out the re-testing post-occupation. This is provided any specific guidance for particular building types related test conditions have been met (for instance, it may be that some building specific guidance requires furniture or carpets to not be present during the testing). Compliance cannot be achieved based on a letter from the SQA confirming that the contractor has followed their advice to achieve the required performance. 
07.11.18 KBCN amended to allow for re-testing to be carried-out post-handover.

Restricted movement within a secure perimeter - KBCN000009

Where the movement of pedestrians, cyclists and vehicles is tightly controlled within a secure perimeter due to security considerations, these areas do not need to strictly meet the safe access criteria. However, justification and evidence provided by an appropriate member of the project team must demonstrate how the layout, measures and secure nature of the site result in a safe environment for cyclists, pedestrians, and vehicle access, in line with intent of each criterion. Where a criterion is not applicable due to the secure nature of the site, this should be noted and justified in the assessment report.   
24 May 2024 - New guidance introduced to ensure that safe pedestrian, cycle and vehicle movement is considered, even on secure sites with restricted movement.
* As this is a significant change, for any registered assessments where the assessor demonstrates that they have already advised the project team based on the previous guidance, the assessment can continue on that basis. 

08 Jun 2022 Applicability to UK NC2018 confirmed

Safe access criteria requirements – Small infill developments and extensions - KBCN0810

For smaller infill developments (typically those with a total gross floor area of less than 1,000m2) where there is no opportunity to make changes to the surrounding site or access to the building itself (other than those directly related to connecting building access points to existing pathways etc.), it is recognised that full compliance with the BREEAM criteria for safe access may not be achievable.  This applies to developments where either: In such instances the existing site layout should undergo a risk assessment against the BREEAM 'Safe Access' criteria to identify areas where there is potential for enhancement across the site.  The findings should be reported to the client and design team and any non-compliant aspects should be resolved as far as practically possible within the scope of the project, however there is no express requirement to achieve full compliance in every respect.  Where the assessor is satisfied that the above requirements have been met,  the credit for 'Safe access' can be awarded. 
31/03/17 Reference to achieving 'Security' credit removed
17/12/24 Applicability updated to include UKNC 2018 and V6

Site wide approach to ecological enhancements - KBCN1194

A site-wide approach to ecological enhancements can be used on sites where multiple buildings share areas of soft landscaping. The enhancement benefits are applied to the individual building assessments within the site. The benefit can be applied on a site-wide basis provided all developments are completed within the appropriate timeframe of a valid ecological survey. 
16-Apr-2026 - Applicable to NC V7
30-Oct-2025 - Applicable to HQM V6 and UKNCR V6.1

Studio Bedroom Daylighting Calculations - KBCN0733

Where studio rooms in multi-residential projects include multiple area types (e.g. A kitchen and lounge area), compliance can be achieved where either: 1. The entire studio room meets the more onerous requirements or 2. The room is nominally divided into the relevant spaces and the requirements are applied to each as appropriate.

Submitting aftercare & post occupancy evaluation data - KBCN0589

Where credits have been awarded which require post-occupancy evaluation or an element of aftercare data collection (according to scheme requirements) from the building once operational and occupied, the data gathering must take place at the specified time and the findings reported to BRE. The timing of this evidence gathering depends on the criteria of the specific BREEAM scheme. However, for all schemes, once the evidence is due for submission, it should be sent on the assessor webform with the following subject; 'BREEAM Assessment Type - Building Data - BREEAM Assessment Reference' For example: 'BREEAM NC 2018 - Building Data - BREEAM-1234-5678' 
29-Oct-2025 - Applicable to HQM One, HQM V6 and UKNCR V6.1
05 Nov 2024 - Wording clarified and link to the webform added
This replaces KBCN0695 for HQM.

Thermal comfort – Changing rooms - KBCN1133

Whilst thermal comfort in changing rooms may be considered as significant, such spaces are, generally, outside the scope of this Issue, as they would not fall within the definition of an 'occupied space'. 
17/06/2019 - This supersedes the advice previously provided in this KBCN, which was published in error on 13/06/2018

Ventilation – Filtration – Non-residential assets - KBCN0797

Relevant specialist required The design and specification of air filtration for mechanical ventilation requires the input and review of a relevant ventilation designer or specialist. It is their responsibility to interpret the requirements of this KBCN to align with local conditions. Referenced standard The requirements for air filtration in mechanical ventilation systems follows EN 16798-3:2017 Section B4.2. This standard replaces EN 13779:2007. See KBCN1054. Supply air quality Outdoor air quality The filtering required to achieve SUP2 is affected by outdoor air quality. Outdoor air quality (ODA) in both EN 16798-3:2017 and EN 13779:2007 are defined as: As ODA definitions are relative to national air quality standards, these will depend on local regulations and the location of the asset. Please refer to the relevant specialist on how to correctly classify ODA for your asset. Where multiple pollutants or outdoor air intake locations result in different ODA categories, the overall classification for the asset should be based on the highest (worst-case) ODA category applicable. 
27-Feb-2026 Note added to clarify the approach where more than one ODA category is applicable.
18-Nov-2022 Title amended to differentiate between residential and non-residential filtration KBCNs.
06-Sep-2022 KBCN re-written and re-named to clarify BREEAM ventilation filtration requirements in relation to new ventilation standards. Scheme applicability updated.

Ventilation – Single room MVHRs - KBCN1042

Single room mechanical ventilation heat recovery units do not need to show that the air intake and exhaust are a suitable distance apart. However, the air intakes of these units must be located to minimise intake of other potential external pollutants. 
11-Oct-2022 - Title amended for clarity and consistency. Wording simplified. Scheme applicability updated.

Verification of Security Needs Assessments/Security Risk Assessments - KBCN1770

Where the author of a Security Needs Assessment [‘Security Risk Assessment’ in BIU] does not meet the BREEAM competency requirements, compliance can still be achieved where the report is reviewed and verified by a qualified SQSS [‘Competent Person’ in BIU], who confirms in writing that it is accurate, appropriate and in line with industry best practice. In these circumstances, the SQSS or ‘Competent Person’ is expected to verify and take ownership of the report and accept professional responsibility for its content.

Version of ASL to submit to QA - KBCN1892

The version of the ASL that was current at the time of registration, or a more recent version, must be submitted. An older version must not be used. For a post-construction assessment, the registration date for the design stage of the assessment must be considered. Please indicate the version of the ASL that has been submitted to QA, either in the name of the document or in the assessment report. Please be aware that the upload dates (stated beneath each ASL file on BREEAM Projects) may differ from those above. Please ensure you refer to the above version date.

View out – communal lounges, living rooms and bedrooms - KBCN1828

The default criteria for these space types requires relevant positions to be within 5m of an opening. Where larger spaces are ≥ 50m2 NIA, the standard view out criteria for the relevant scheme is applied instead. The 5m rule is intended for small scale domestic spaces where proximity to a view out is beneficial. This KBCN recognises that for larger relevant spaces in Residential, Multi-Residential and Residential Institution asset types, a scalable approach in line with commercial buildings is more appropriate.

View out – eye level - KBCN0581

BREEAM defines an adequate view out as being at seated eye level (1.2 – 1.3m) within the relevant building areas. However, where occupants will not have the option to be seated, for example in some industrial operational areas where the work being undertaken requires occupants to remain standing, the height of the view out can be changed accordingly to suit the eye level of occupants. All other view out requirements have to be met and clear justification provided for changing the height/level of the view out. In some relevant building areas, occupants may not be sitting down to undertake tasks. Allowing the view out height requirements to be changed accordingly ensures building occupants gain maximum benefit from the view out.   

VOC credit issues – Clarification of scope - KBCN1797

The scope of these requirements does not include furnishings or moveable furniture, e.g. desks, seats or shelving. It includes fixtures and fittings that are integral to the building, such as kitchen units and toilet cubicles. However, bespoke fixtures, such as purpose-made items of fixed furniture, can be excluded, as the specified compliance testing is not appropriate for such items.

Zoning and occupant control – access to lighting controls - KBCN00032

The relevant areas for the criteria apply only to areas where users are expected to have control. For instance, this means that areas intended for the general public, or a shop floor would not be expected to have lighting controls. The general principle which applies to user access to general environmental controls (heating, cooling, ventilation) may also apply to access to lighting controls. See KBCN0170. However, the the exact approach may differ between the two types of systems and assessor judgement must be used to determine compliance. In all cases zoning is required in all areas of the asset where specified in the assessment criteria. Please refer to the specific requirements of the applicable BREEAM standard to interpret this guidance appropriately. 
14-Dec-2022 - KBCN applicability updated to include BIU. Wording updated. Link to KBCN0170 created.

Zoning and occupant control – control via BMS - KBCN0703

Occupant control via a BMS is not normally considered a compliant BREEAM solution. Any solution that requires the action of a third party (e.g. facilities manager) is not considered under the control of the occupant. Solutions where all relevant building occupants have control via a user-interface via BMS may be considered compliant where the assessor is satisfied that the aim of the criteria are met. User-control must be available directly to the occupant. 
21-Jul-2026 - Applicability updated
01-Aug-2017 - KBCN applicability to Thermal comfort Issue removed.

Zoning and occupant control – PIR detection systems - KBCN0335

The aim of the Health & Wellbeing category is to recognise ways to benefit occupants through giving them control of their lighting environment. Without manual overrides, presence or absence detection lighting controls (such as PIR detection systems) are not compliant with the criteria. BREEAM recognises the energy efficiency benefits of detection systems in buildings through the Energy category. In some cases, the design team may have to prioritise one particular lighting strategy to the detriment of achieving a credit elsewhere. 
17 09 2024 Updated to apply to BIU Part 1 - Lighting Controls
28 04 2021 Wording amended to include absence detection systems.
18 09 2017 Wording amended to clarify the meaning.
 
Information correct as of 29thJuly 2026. Please see kb.breeam.com for the latest compliance information.