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Standard Assessment Procedure

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The Standard Assessment Procedure (SAP) is the method of assessing the energy performance of dwellings used in Energy Performance Certificates (EPC).
The Standard Assessment Procedure (SAP)

The Standard Assessment Procedure (SAP) is the UK Government’s National Calculation Methodology for assessing the energy performance of dwellings. It is used to facilitate various national, devolved and local government policies including Building Regulations and for the production of Energy Performance Certificates (EPCs).

SAP was first published in 1993, but has since been updated regularly, with new versions published in 1998, 2001, 2005, 2009 and 2012. SAP 10 came into use from June 2022 in England, then in Wales and Scotland later in the year.

BRE Technical Notes for SAP and RdSAP
SAP 10

SAP 10

This site hosts documents and information relating to version 10 of the Standard Assessment Procedure SAP 10.

Explore SAP 10

BRE Technical Notes for SAP and RdSAP

Technical Notes are produced by BRE to enable the recognition of certain technologies in SAP and/or RdSAP assessments.

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SAP and RdSAP
SAP 2016

SAP 2016

See and download documents and information relating to the 2016 edition of the Standard Assessment Procedure.

View SAP 2016

SAP 2012

Information and downloads for the 2012 edition of the Standard Assessment Procedure, SAP 2012.

View SAP 2012
SAP 2012
SAP 2009

SAP 2009

A dedicated page for information and downloads about SAP 2009, a previous version of the Standard Assessment Procedure which was published in 2009.

View SAP 2009

SAP Scientific Integrity Group

The SAP Scientific Integrity Group (SAPSIG) maintains and protects the integrity, coherence and impartiality of the SAP model.

More about the SAPSIG
SAP Scientific Integrity Group
The SAP Industry Forum

The SAP Industry Forum

The SAP Industry Forum (SAPIF) has been created to provide a clear route for industry to feed in and discuss their views on the development of SAP.

More about the SAP Industry Forum