Got a source for this?
I'm only finding sources that vehemently disagree, and say the only countries worse for this are Portugal and Canada. Everywhere in the world is better.
But if you compare the price of the SAME sized house to the average income, the situation is opposite. U.S. is the 3rd best after Oman and Saudi Arabia. It's just that Americans are not satisfied with houses even twice the size of what people in many rich countries are happy with.
https://www.numbeo.com/property-investment/rankings_by_count...
Price per square foot is not a very useful metric, because neither utility nor construction costs scale directly with the size of a house. A 3000 square foot house is not 2x as good as a 1500 square foot house, and it should not cost 2x as much to build. Roughly speaking, walls are expensive, while making the rooms larger is cheap. And bedrooms are cheap, while bathrooms are expensive.