There is a deficit of around 40 million units in the US. Desired household sizes keep decreasing due to ongoing drops in marriage and childbearing rates, which

There is a deficit of around 40 million units in the US. Desired household sizes keep decreasing due to ongoing drops in marriage and childbearing rates, which increases housing units out of historical proportions. This is compounded by the desire for vacation homes and the continuing opposition to increased housing in privileged areas such as the coastal cities. Here's a fun graph from the US Census Bureau: https://images.squarespace-cdn.com/content/54683a71e4b0768e168af8a5/1416118570700-0AL9F1GK5P4YTIQFYAPP/housing-2010-10-20-new-home-construction-sa-iacono.jpg?content-type=image%2Fjpeg https://images.squarespace-cdn.com/content/54683a71e4b0768e1...