RdSAP 10 – Update to the EPCs

The Energy Performance Certificate (EPC) process in England is undergoing a significant update with the introduction of RdSAP 10—Reduced Data Standard Assessment Procedure version 10. This new version represents changes in the way domestic energy assessments are conducted for existing homes and will come into force in June 2025.

RdSAP 10 – Key Updates to the EPC Methodology

RdSAP is the Government-approved methodology used to produce EPCs for existing dwellings. It uses standard assumptions to generate a rating that reflects the energy efficiency of a property. Version 10 marks the first major update since RdSAP 2012 and aligns with broader government objectives to improve energy efficiency, reduce carbon emissions, and inform retrofit strategies.