Type a UK postcode and we query the official GOV.UK Energy Performance of Buildings register live — no cached copies, no scraped data. Every certificate lodged at that postcode comes back with its current band A–G, the address, the local authority and the registration date, and each one links straight to the full certificate on GOV.UK: the numeric score, the potential rating and the assessor’s recommended improvements.

Because certificates last ten years, a postcode often shows several per address — read the most recent one, and treat an old certificate as a prompt to ask whether anything (boiler, insulation, windows) has changed since it was issued.

The band is a running-cost signal first: the gap between a D and an F home can be well over a thousand pounds a year in energy. It also matters for landlords — minimum-standard rules apply to lettings — and increasingly for lenders, some of whom price “green” mortgage products by band. The recommendations list on the full certificate is effectively a costed improvement plan for the property.

An EPC is one panel of the picture. See it alongside sold prices, crime, flood and planning for any property in its OfferCheck, or check the letting angle first: can I rent out a property with a low EPC?