Only once the architects have an idea of how to shape the inside space of a building, do they start designing the exterior. That is not to say the exteriors are an afterthought; far from it. A real eye-catcher is Villa Kogelhof in Zeeland. This luxury home, in the middle of a nature area, is completely self-sustainable. “It generates more energy than it consumes. Surplus energy is used to charge an electric vehicle,” says architect Paul de Ruiter. An abundance of sunlight can enter the “floating”, glass living area.