However, buildings built today to today's modern standards (with a little foresight) could easily be fine 100 years in the future. I'm not talking about fragile glass showpieces, but simple properly insulated homes built from durable materials.

My biggest issue with old homes is the layouts tend to be weird for today’s uses. Where I live many of the homes have a lot of small rooms and and narrow doorways instead of larger ones, for instance.

This of course goes back to conserving heat. But it makes house hunting difficult when trying to find a house with a layout you like.