Energy Performance Certificates help to tell prospective buyers about the energy efficiency and potential running costs of a property. They also highlight any potential improvements that could be made along with the cost and potential savings such improvements will bring. Generally, if you want to sell your house, you will need to have a valid Energy Performance Certificate (EPC) in place.
An EPC is valid for 10 years from the date of issue. They are issued for the property, not the owner, so even if you did not get the EPC carried out, you can still use the certificate when selling your home if it’s valid (unless you have carried out alterations during your period of ownership in which case you will need a new EPC).