You could utilize the slanted-roof for passive solar heating. Canadian company NOMAD Homes has produced a new concept micro-home that measures just 100 sq ft sq m), ships as a flat-pack, can operate off-grid, and is said to be easy-to-build.
Connected Homes - 842 Total Square Ft - 1 Bedroom - 1 Bath This would be a nice efficiency in the round. Access to the single bath is from community area as well as from bedroom, but tub area can be closed off. I've always wanted a roundish shapes home
Gives a good idea of tiny house lengths & square footage, with basic layout elements in relation to a traditional parking space. Overly simplified but gets the point across really well. - Decoration for House