"Unfortunately, with the call for ever cheaper rents or even the nationalization of housing associations, we're not getting any closer to our goal," said Landsberg. The demand for apartments, especially in the metropolitan regions, is increasing unabated.

The federal government's goal of completing 400,000 new apartments per year is "barely achievable," Landsberg stated. There is a lack of land, building prices have risen significantly and there is also a lack of specialist companies that could erect the buildings. Rising interest rates are making financing more difficult, and the increasing demands for energy-efficient refurbishment are making construction even more expensive.