The brief required a compact, economical, architecturally restrained building that would also be energy-saving in use. The architects designed a low-energy house with a floor area of 141 m². Large areas of glazing to the west face and a south-facing collector installation allow the active and passive exploitation of solar energy. The highly insulated construction consists of a timber frame with prefabricated wall and floor elements. The gable ends are clad in uncoated cement-bonded flat panels. The west façade has a variable appearance as a result of the sliding-pivoting sunscreen elements.