Why do WDH provide me with an Energy Performance Certificate? Energy Performance Certificate (EPC) is a legal requirement. It is a legal requirement that all domestic and most commercial buildings in the UK, available to buy or rent, must have an Energy Performance Certificate (EPC). For more information visit Energy Saving Trust. Keywords first time buyer ; deposit ; buy a home ; buy a house ; waiting list ; property ; ladder ; energy ; certificate ; shop ; shop for rent ; shops for rent ; commercial property ; lease a shop ; shops to let West Yorkshire Related links Energy Saving Trust