Lowtech Graph lists low-tech options for every need of a home. Here you can compare them, find tutorials to build them, and link them together into a circular system. Why low-tech?
Space to be outside while still sheltered: a porch, a terrace, a roof over a doorway. It is the cheapest room a house can have, since it needs no heating and often no walls, and in summer it takes the place of an indoor one.