> Generally speaking you only see good buildings get demolished when the land becomes worth so much relative to the structure that it makes economic sense to kn

> Generally speaking you only see good buildings get demolished when the land becomes worth so much relative to the structure that it makes economic sense to knock it all down and do a clean sheet because the little extra optimization you get from doing that is worth more than what you would have saved by keeping the sub-optimal structure. My city has passed so many building code requirements on remodels that now days it is, from what contractors have told me, about the same price to remodel as to tear down and replace. I was quoted over 150k to add a new bedroom to the 2nd floor, most of that is because the city would require me to completely replace my roof structure with a brand new one to bring it up to modern insulation standards. I imagine, without doing the math, that the carbon footprint of tearing down a house and building a new one is much higher than whatever energy is going to be wasted by having amazing-but-not-the-best-insulation in my attic.