Monument protection and technology in harmony
STRABAG AG is supporting the renovation of the Landhaus Solothurn. In addition to renewing the building services, the renovation plan includes a sustainable heat pump system. The location between the old town and the River Aare places high demands on logistics and the handling of the historic building fabric.
According to a press release, the Schlieren-based construction company STRABAG AG and its building construction department are taking on “central tasks in the comprehensive renovation of the Landhaus Solothurn”. In addition to measures to modernize the building’s technical infrastructure, including plumbing, ventilation, lighting and stage technology, the focus is on modernizing the heating system.
This will be converted to resource-saving energy generation by means of a heat pump. Water from the River Aare will be used as a heat source to supply both the Landhaus and adjacent public buildings such as the youth hostel, Kollegium school and municipal theater.
The location between the old town and the River Aare requires logistical attention. Material deliveries and waste disposal had to take place in the morning so that the riverside promenade could be used as a promenade from midday.
It was also necessary to take into account the stringent requirements of monument protection. The listed country house is like a “winding architectural work of art with six levels, each with its own renovation requirements”. The approach required “sensitivity” in order to preserve the historical character and the fabric of the building. In particular, the original Solothurn limestone staircases are to be preserved in their uniqueness, it is said. Special protective devices have been created for this purpose.
Solothurn voters approved the renovation in October 2023. Construction work has been underway since January 2025. Construction is scheduled to end in October 2026. In January, construction site operations will be suspended in consideration of the Solothurn Film Festival 2026.