Interesting related graph: https://infogram.com/1pqdpn20vkmlelcq6qx7jzwz9pf00g9xnq5
Although we're currently in a frothy situation, scaled out a bit, it's not clear that housing prices are growing more than general inflation when adjusting for square footage. What _has_ happened is A) houses have gotten bigger and B) people per household has gotten smaller.