New Construction / NOR / 2016 / 07 - Waste /

WST 03a

Information correct as of 1stDecember 2021. Please see for the latest compliance information.

Alternatives to composting - KBCN0465

In anaerobic digesters, organic waste is digested by micro-organisms which break down fats, oils and grease. Digesters where the only output is water that is safe to discharge into drains and sewers are acceptable alternatives to composting. Macerators which simply reduce solids into small pieces through a shredding or grinding process and flush the residue into the drainage system are not an acceptable alternative to composting.

Home composting facilities – clarification - KBCN0927

Home composting facilities are individual composting containers placed within the kitchen area or communal space for each self-contained dwelling, bedsit or communal kitchen. These containers are either emptied into local on-site communal facilities or are collected by composting collection services run by the waste collection authority. Individual composting containers should be:
  1. Located in a dedicated, non-obstructive position.
  2. Easily accessible to all users.
  3. Durable, low maintenance and cleanable.
  4. Enclosed to manage odour and pest issues.

Labelling and signage – Shell only/Shell & core assessments - KBCN1380

For a shell only or shell & core assessment, in terms of labelling individual bins, a written commitment from the developer is acceptable as future waste streams may be unknown and it is recognised that the bins may not be provided by the local authority/waste management company at the time of certification. However, it is a requirement of criterion 1 that the space itself is clearly labelled, ie. has appropriate signage, to indicate that it is to be used for storing recyclable waste

Multi-residential: Waste storage shared by more than six bedrooms - KBCN0856

Where multi-residential buildings contain communal facilities shared by more than six bedrooms, the requirement for total waste storage can be increased on a pro-rata basis to demonstrate compliance. For instance, if the standard requirement is 30L for six bedrooms, this equates to 5L per bedroom. Where assessing a flat with eight bedrooms, this requirement increases to 40L (8 x 5L). The minimum size of individual containers remains unchanged as per the criteria.

Off-site waste sorting - KBCN0696

Where a building's recyclable waste is sorted off-site, BREEAM requirements relating to segregation of recyclable waste need not be met. In such cases, the assessor should provide evidence of the following:
  1. That a waste management plan is in place which provides adequate storage for the frequency of collection
  2. That the space could reasonably be converted to comply with all BREEAM waste storage requirements if required
  3. That an on-going co-mingled waste recycling contract is in place
  4. The typical recycling rates from the waste management company
BREEAM assesses the sustainability of the building itself rather than the management practices of the current occupier. 
16/04/18 Wording clarified.

Operational waste requirement for catering – applicability - KBCN1162

The additional operational waste storage requirement for developments which include catering is generally only applicable where a commercial scale kitchen is present. Where the design team can justify that there will be no significant waste streams from a modest facility, such as a small cafe, selling only drinks and pre-prepared snacks, the additional waste storage area identified in the default values does not need to be provided to meet compliance.

Waste storage provision for catering - KBCN0755

As the manual states, the additional 2m2 per 1000 m2 of waste storage area provided for catering is measured against the "net floor area where catering is provided" and NOT the floor area of the catering facility. Generally, a catering facility will serve building users throughout the building. If it can be demonstrated that this is not the case, for example if part of the development is subject to a separate tenancy, not served by the catering facility, the area calculation can be adjusted accordingly. Where the net floor area is not indicative of the actual occupancy, the default values may not be appropriate. In such cases, the predicted waste streams should be calculated based on the actual occupancy and waste streams generated. This requirement accounts for the increase in waste produced by building based on the likely number of building users served by the catering facility. Please note that these default calculations are only intended for use where it is not possible to determine accurately what provision should be made based on predicted waste streams. 
15 06 2017 Wording updated to clarify

Information correct as of 1stDecember 2021. Please see for the latest compliance information.