Guides & InsightsHome & living
Reading an EPC without over-reading it
Understand ratings, recommendations and floor area while respecting the certificate’s date and inspection limits.
Short answer
An EPC is a dated assessment of a building’s energy performance using a defined methodology. It can provide current and potential ratings, recommendations and total useful floor area, but it is not a structural survey, utility-bill promise or proof that an address matches another dataset.01
Check identity and date first
Confirm the address or UPRN shown on the certificate and whether a newer certificate exists. The open data includes certificates since 2012 and may contain records that have expired or been replaced.
02
Understand what the rating describes
The rating and recommendations follow the certificate methodology and the evidence available to the assessor. Features that could not be evidenced may be treated according to methodology defaults. The result does not predict a particular household’s bills.
03
Use floor area carefully
The certificate can include total useful floor area. Greathome only calculates historic sale price per square metre after you explicitly link the correct EPC to the selected HMLR address. The sale and certificate dates may differ, and the metric is not a valuation.
Floor area is pending in the sold-record list until an exact EPC is connected; Greathome does not estimate it from property type or price.
Sources and review
Check the original guidance
- 01Find an energy certificate GOV.UK · checked 6 September 2026
- 02Energy Performance Certificates for dwellings GOV.UK · checked 6 September 2026
Manual launch edition. Material claims are linked to the sources above. Time-sensitive rules must be checked again at the next review date or when an official source changes.