CSD Archtecten is a trio of creatives made up by; Britt Crepain, Stefan Spaens and Joep Debie. They designed this house that is located in the center of Antwerp, Belgium. Despite the confined space, the house eloquently contains four split level floors, a basement, ground floor, and a roof terrace.CSD Archtecten had to be extremely inventive to optimize the space of every room. For instance, behind the door in the library there’s a wash room.(source  buzz-beast)