Standard Assessment Procedure (SAP 10)

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

Please note that until legislation comes into force requiring the use of SAP 10.2, SAP 2012 must continue to be used for Building Regulation compliance and for producing Energy Performance Certificates, in conjunction with the 2006 edition of BR443 (for calculating U-values). 

SAP 10.2, in conjunction with the 2019 edition of BRE 443, will be adopted for Building Regulations purposes in England from June 2022. Other UK administrations are expected to adopt it later as part of regulatory updates.

Demonstration software implementing SAP 10.1, used for the UK Government’s consultation, is available here.

Demonstration software implementing SAP 10.1, used for the Welsh Government’s consultation, is available here.

The demonstration software  mentioned above cannot be used for official purposes. A list of SAP 10.2 software that has been approved for official use is shown under ‘downloads’, below.

Downloads

SAP 10.2 specification (21/04/2022)

SAP 10 version history

Current list of approved SAP 10 software

Briefing note on primary energy factors used in SAP 10 (01/10/2019)

SAP 10 Technical Paper S10TP-15: CO2 and Primary Energy Factors for SAP Version 1.1 (25/11/2020)

Earlier versions of SAP 10 related documents can be found here.