The house on Tobelhusstrasse is one of the four houses by architect Cramer on the same street. The surfaces of the buildings are made of fair-faced concrete, rough plaster, and copper facings. To keep the sculptural construction readable in its original form, a slight, autonomous structure was added and copper seemed the best material to use for the building envelope.
The extension, in Swiss-German called Chupferchessi or copper pot, houses in the basement, the wine cellar, and on the ground floor, the kitchen. Thus, the extension is truly a vessel for drinks and food into which the sunlight penetrates through a skylight.