As of 15 June 2025, the Energy Performance Certificate system has been overhauled – with the introduction of RsSAP 10. The methodology that is used to carry out the assessment is more thorough, and more accurate to reflect the individual property being assessed. With this more detailed report, will come higher costs for EPCs, but as the certificate lasts for 10 years, the higher cost should not be a huge problem for landlords.
What is RdSAP? The Reduced Data Standard Assessment Procedure is the methodology used to produce EPCs. It uses assumptions about how buildings are constructed and occupied. The RdSAP 10, launched from 15 June, incorporates new data inputs, revised assumptions and structural changes to make EPCs more accurate.
What has changed in the assessments?
- More data collected, such as build materials, types of glazing, specific models of heating, presence of smart heating controls etc. Documentation is vital for assessors
- Accurate heat loss calculations. Good for mid terraces and flats
- Thorough checks for presence of extractor fans, ventilation systems etc which can exasperate heat loss/energy costs
What can landlords do to keep their EPC rating as high as possible?
- Take advice from your EPC assessor – they are the experts!
- Keep receipts and photo evidence for all materials used in renovations and home improvements.
Article Abridged from Propertymark