It is a legal requirement that all residential and commercial property within the UK that is available to either purchase or rent must have a valid Energy Performance Certificate (EPC). If you are selling your home the EPC must be valid for the entire marketing and conveyancing timescale.
The EPC will show the potential costs involved for lighting, heating and hot water at the property and also the buildings energy efficiency in the form of an A - G graph here A is he most efficient and G the least.
