This construction project is a reconstruction and an addition of 2 storeys to an existing building as well as a complete new construction of a 6 storey high residential building with a 2 storey underground parking garage within the city of Cologne. To sustain the additional loads from the new 2 storeys, the existing building was fortified by a steel-construction and a new pile foundation. Therefore hydraulic presses were used.

To build the 2-storey underground parking garage, the adjoining house had to secured and underpinned. Bored piles ensure the transfer of building loads into the foundation soil, which is about 12 m below ground level.