In 2017, Klingsöhr, together with a private investor, acquired the prominent, approximately 9,000 m² property in Prenzlauer Berg, one of the last inner-city corner properties in Berlin. A discursive urban development master plan procedure was carried out together with the Monuments Office, neighbours and district representatives. The special restrictions of the directly adjacent residential town of Carl Legien, a UNESCO World Heritage Site, had to be taken into account. Planning rights were obtained for approximately 21,000 m² of gross floor space for office and residential use. The subsequent architectural competition was to provide a planning concept on the basis of the urban development draft.