Small House by Japanese studio Unemori Architects is a multi-level single-family residence in Tokyo, Japan. Small House is located on a site measuring less than 35 square metres, consequently the design is vertically arranged, all connected via a central spiral staircase. Each floor at Small House has a specific use, so then the ground floor (partially below street level) is the bedroom, the first floor is the dining room, the third floor is a spare room and the third floor is the bath room. (via I Like Architecture)