in EU we have these stickers. You cannot build houses with lower "tier" energy "stickers" anymore. New houses have to be built very efficiently and be certified

in EU we have these stickers. You cannot build houses with lower "tier" energy "stickers" anymore. New houses have to be built very efficiently and be certified where their yearly energy costs will be calculated. (HVAC, air sealing, building materials like windows/insulation and so on are taken in account)