You can usually find energy efficiency information for housing you purchase. You may not be able to find it for rental housing. Something like "mpg" will depen

You can usually find energy efficiency information for housing you purchase. You may not be able to find it for rental housing. Something like "mpg" will depend a lot on your lifestyle, how many family members, etc. It's not realistic. But what you could do is create a generic "score" -- which I think is what you really want -- that takes into account things like insulation and double pained windows, and then you can buy houses with higher scores. This was the idea behind LEED certification for office complexes, so I think you want something like that for residential housing. The good news is that this exists! https://www.usgbc.org/leed/rating-systems/residential https://www.usgbc.org/leed/rating-systems/residential So what I think you really want is to mandate that every residential construction project obtain a LEED rating -- or equivalent -- which of course will add to the cost of residential housing. That's a trickier question. But seriously, we don't need more housing subsidies. Whether or not more regulation is needed is a quantitative question. Newer homes already have better insulation tech, for older homes, it depends on whether the owners upgraded them. If they did, you can be sure they will advertise this info in order to get more when they sell it. Regulating disclosure of this for rental housing by landlords might be a good idea, though.