We have a neighbor couple near our Adirondack cottage that had a 380 sq ft "tiny house" custom built last year to use as a seasonal residence. This year they're working on the details of how to expand it so they don't feel so cramped. The problem isn't so much the small square footage as it is the layout. They feel, and we agree, that our 324 sq ft motorhome is roomier than their 380 sq ft tiny house.