In found this piece of information in Leigh Gallagher's The End of the Suburbs: Where the American Dream Is Moving: The average age for homes in the US is just 35 years. That age would have fallen if reality hadn't caught up so soon with the home construction boom that began in 2002. When reality final bite, the global financial system crashed in 2008.
I bring this up because, one, I hate detached houses (apartments are the most advanced and the highest spiritual form of human housing); and, two, though I live in a detached house, it has at least this virtue: It was made in 1904. The fucker is old, crooked, creaky, and much used. For a detached house to be anywhere close to green, it must be in a big city, near public transportation, and old enough to be a haunted house.