The minimumhouse at Mellensee by Scheidt Kasprusch Architects, situated to the south of Berlin, is a prototype for a serial holiday and residentialhouse. The concept was developed by the ideal of a house with maximum outdoor impressions and also by making full use of the solar yields for the building. The reflections of glass and light make the three-side glassed building shells appear immaterial. The team consisting of architects, engineers, building physicists and executing companies developed a modular building concept, that allows a contemporary open-plan living with high ecological and economic standards. All materials and surfaces used for the minimumhouse have been chosen in accordance to ecological and sustainable criteria.