Qualified, accredited and insured Domestic Energy Assessor, offering advice and recommendations on how to improve your home energy efficiency. Selling or renting a property? - Energy Performance Certificate (EPC) is a legal requirement that must be commissioned before the marketing of a building for sale or rent if there is no valid EPC for that building. - An EPC is valid for 10 years and can be reused as many time as required within that period. - An EPC will show an energy efficiency rating on an A-G rating scale for a building, along with recommendations of how to improve the energy efficiency. - Without an EPC rated E or above, landlords may face civil and criminal penalties for signing a new tenancy, or renewing an existing tenancy. - There may be fines of up to £5,000 for landlords that are found in breach of the legislation.