Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what assessment he has made of the potential impact of the new RdSAP10 Energy Performance Certificate methodology on EPC ratings.

The Government recognises EPCs as crucial for informing consumers about energy costs, emissions, and supporting Net Zero goals. An updated assessment methodology, RdSAP 10, will be introduced in early 2025. Developed with the EPC industry, this update aims to enhance the accuracy of energy performance evaluations by including detailed measurements like window sizes and battery storage. These changes ensure EPCs better reflect actual energy performance, aiding consumers in making informed decisions. The revised methodology will offer more reliable energy ratings and a clearer understanding of home efficiency.