Fair enough. Way I see it is: Regulations on new buildings are fine (architecturally no, as long as they can be made energy efficient) but I still can't agree with forcing people to upgrade old houses. Incentives are one thing, but forcing....not ok with me, considering the possible financial difficulties. I'll use my situation as an example, though obviously I don't live in Europe: We're in a 40 year old house, obviously it's not particularly energy efficient. My parent's aren't exactly poor but could not afford the money to completely redo the house to make it energy saving. As repairs come a long, we do them, we've slowly replaced the toilets with water saving ones as they break, and most of the rest of the appliances. Same thing for the roof tiles, and a few of the windows, so our house has definitely improved over the last 10 years. Thing is, repairing slowly as stuff breaks is the only way it's economically feasible for us.