Feeling cramped at home has a limited set of solutions: Get out or grow out. That is to say, you can either move out to a new dwelling, or decide to add on to your existing structure. Or, in the cases of these real homes, do a little bit of both, by expanding your usable living space into a shed or yurt in the backyard. Erin and Nathan are the owners of a bohemian clothing shop, Tavin, in Los Angeles.