Ene 02 - Prediction of operational energy and carbon

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

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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.

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