The world's skinniest house, currently being built in a tiny alleyway in Warsaw, is 40 feet long but only 60 inches wide. That's narrower than a queen-size bed, narrower than most couches — even narrower than some people's TVs. Like any tiny housing, it encourages low-impact living, with the bonus that it sits in urban space that would otherwise go unused.
The skinny house already has a resident: Israeli writer Etgar Keret, who writes very small, very weird stories. That, at least, should be a perfect fit.