This building is simple, but striking. The rustic charm of exposed concrete – a double-layered concrete façade with cavity insulation – plays off against the ethereal transparency of broad windows. Elements of Sipo mahogany, strategically placed, give the façade depth; and the clean lines add a sense of order and dynamics. The office building consists of three full floors, a garden, a roof and cellar. The simplicity of the interior design, with its sandblasted and exposed concrete surfaces as well as its cement screed flooring, works in harmony with the outer appearance. Open floors, which nevertheless have clearly defined spaces, make the boundaries between working areas disappear.Certified with Gold by the DGNB (German Sustainable Building Council), the building incorporates a broad range of sustainability measures. Amongst them are the prevention of toxic materials or the reduction of the life circle costs. The intermingling of ecology and economy also shows within the fusion of building construction and technology which includes a thermally comfortable room climate as much as energy saving at the maximum. The lighting concept which relies on daylight and LED technology belongs as much to the measures as do air hygiene and aesthetical aspects.