I grew up in an 1,100 square foot house, built in 1950, my parents bought for $175,000 in 1989. Today Redfin has it at $660,000. Its a drab house in a drab suburb of DC. It's no boom town--the population of the town has grown just 10% in 30 years. But everyone just has so much more money now (and I guess interest rates are low, so people have a lot of credit).