The refurbishment of the apartment building from 1896 covered both energy and technical renewal. Contemporary interventions such as the extension on the courtyard facade, new windows on the gable facade and the replacement of the balconies on the street facade, which were at risk of collapse, were carefully combined with the historic building fabric.

Because of the heritage protection, the limited space in an urban setting, the demanding historic fabric and the defined cost frame, the refurbishment was a challenge.