- Just 1 in every 11 properties sold over the past year has achieved the highest energy performance certificate (EPC) rating of ‘A’ or ‘B’. Such properties have commanded a 15% price premium over a ‘D’ rated property (based on £psf). 65% of homes are rated ‘D’ or lower. Brrrrr!! Source: Dataloft, Land Registry, DLUHC, based on properties sold over the past 12 months.