The plans for of this prefabricated house are based on the idea to bring a house on the market that is high-grade in quality as well as ecologically and comes as a standardized, low-cost mass-product. A variable floor plan shall permit space for special needs of different target groups. The intended formal reduction of the essentials leads to a high architectural quality, together with a maximum of variability. This makes allowance for the individual organization of the house. A cube forms the formal basis of the building. It contains the living areas as well as the accesses and can be extended with different functional modules. By joining the box modules that offer the necessary functional spaces such as sanitary devices and domestic technique, the cube becomes utilizable as a house.