An Energy Performance Certificate (EPC) measures the energy efficiency of a property on a scale of A-G.

Energy Performance Certificates were introduced in England and Wales in 2007 and are a legal requirement for a building to be sold, let or constructed. Once obtained, an EPC is valid for 10 years.

The most efficient homes - which should have the lowest fuel bills - are in band A. The Certificate also tells you, on a scale of A-G, about the impact the home has on the environment. Better-rated homes should have less impact through Carbon Dioxide (CO2) emissions.

The average property in the UK is in bands D-E for both ratings. The Certificate includes recommendations on ways to improve the home's energy efficiency to save you money and help the environment. EPCs apply also to commercial buildings and are rated only by Carbon Dioxide emission ratings on a scale of A-G.