Created as an office building, the house has an unusual shape, caused by the two shed roofs. The house on the street side has thereby three floors on the street side and on the courtyard side even four floors. On the contrary the wing in between designed for the stairway and is covered by a flat roof. Once the company name Sernau was mounted with metal letters on the flat roof as advertising. In a mixture of cubist and expressioniost forms, the windows are set far back in the house's facade.
The mullion on the front door was added during the 1991 reconstruction. The formerly probably yellow wooden window frames have been replaced by white plastic frames. Also the window type has changed. The first windows were horizontal pivot windows, no are used casement windows.