`Haus Colmantstr.´
Renovation of an original house from 1870,
Bonn-Weststadt

The construction work involved restoring the century old building to it's original floor plans. Alterations from the last 140 years were removed in the interest of heritage protection. The roof was repaired and two dormers were installed. Through the installation of new insulation and the renewal of building services, the building passed the energy standard 'Energie-Effizienzhaus 115'.