The NARROWEST house plan you have ever built or been in?

[Karen Margrave]

We are going to be building 2 new condos in San Clemente, CA, and each unit can only be 16' wide. Michael has already designed a 3/3 with under building parking and 2 levels of living space. If we could find 9" more, we could eliminate the lower level garage! But that's not to be. 

However; for fun, I've been searching online for other narrow lot plans that others have built. I must say, so far, nothing had beat what we already have. 

I was just wondering, what is the smallest plan you have ever built? (Plan not lot) 

I also thought some of you from the more populated places like Los Angeles,  San Francisco and the bay area might enjoy this site. Innovative Designs

[J. Martin]

I have not walked in or built these, but I'm sure some folks would enjoy taking a peek at these phenomenally thin buildings in Japan. Cheers to @Shane Pearlman for sharing a bit about Japanese real estate with me when we went hiking down in the redwoods in Santa Cruz. I knew exactly what @Arlen Chou was talking about with a new home. And saw an article about some amazingly thin buildings..

Some of them appear to be no more than 5-6 ft across..

http://weburbanist.com/2010/06/06/narrower-towers-20-of-japans-thinnest-buildings/