The frequently refurbished 1950s building was to be rebuilt for a well-known, Stuttgart-based family of architects. In an effort to work sustainably, the existing building is beeing preserved as much as possible. The reconstruction more clearly organizes space, better frames the site’s breathtaking views and ensures the buildings accessibility despite being constructed on a site with an extreme slope. The building’s open interior has a continuous flow accented by unique architectural spaces and carefully positioned windows. Most importantly, this construction strives to be Energy-Plus and could, in the future, deliver excess energy to the greater power grid. Geothermal wells are used to heat and cool ceilings and floors. Photovoltaic shingles clad the roof and electric filling stations facilitate the use of e- mobility.