Nope, American single family home zoning is really that out of control. Even San Francisco (inarguably an area that should be densely urban) bans duplexes (or

Nope, American single family home zoning is really that out of control. Even San Francisco (inarguably an area that should be densely urban) bans duplexes (or denser) in over 30% of the city's residential areas.