We wanted to build apartments for tenants to rent, with high quality for people with normal income. Quality which we define by interaction of architectural criteria and available money. To reach our intentions as architects, we hold planning, construction, financing and property management in our hands. No compromises and an eye for the project as a whole. A house as a freestanding, multi family house, beside a school building under historical prevention, close to a public transport station, a double-storage system for bicycles and a big natural garden. With leaf imprints on the precast concrete facade elements to make them unique, with identical bathrooms, also precast in the factory and installed during structural work. The height of all rooms is 2,75 m, ceilings are in concrete without coverage. The installation engineering for heating and warm water benefits of environmental energy (solar radiation) only and is 100% neutral to carbondioxid. The system consists of a heating pump, solar absorbers, a control and feedback control system (monitoring) and a underground ice storage (250 m3) which freezes and melts water in seasonal periods and delivers crystallization energy by phase transition (0° K) from water to ice. The Banga, a futuristic modular habitation unit, designed by an italian designer in the 1970´s is for disposition of the tenants to house their guests.