Lucy the Tiny House: a 186 sq ft home in New Zealand, occupied by a couple and their baby girl. (A little small with little closet space and not enough head room in the lofts. Too claustrophobic for me)
basement stair cabinets, stairs with flip up steps and very narrow stairs. Each step goes up one at a time for each foot. It is sort of spaced so you are putting one foot per step with a steeper step. Very space-saving.