EPC and smart meters are now linked under RdSAP 10, with smart meters recorded as part of the assessment. However, having a smart meter installed does not currently influence the EPC rating or band your property receives.

This is because Energy Performance Certificates are based on the building’s construction, insulation levels, heating systems, and overall energy cost assumptions — not on the way energy is used or monitored. A smart meter helps you track real-time usage and may encourage better energy habits, but it doesn’t affect how efficient your home is from a fabric and systems perspective.

Under the RdSAP 10 methodology, the presence of a smart meter is noted for reference on the certificate, much like solar panels or battery storage. It provides a more complete picture of the home’s energy features but does not impact the calculated running costs that determine your score. It is vital that the assessor is able to access your meters in order to record the correct meter type on the assessment.

Looking ahead, smart meters could play a more active role in future EPC versions, especially as time-of-use tariffs and smart energy management become more widespread. For now, they are recorded but don’t carry any weight in the final EPC result.