So that this potential can be utilized quickly, the German government should create incentives and enable special depreciation for add-on storeys too, say the researchers. The focus of the study was the reserves of living space on apartment blocks built between 1950 and 1990. Just with add-on storeys on around 580 000 of these post-war buildings, 1.12 mill. homes could be built in regions with an overstretched housing market, says the study. In addition, a further 420 000 homes could be created on buildings constructed before 1950.
Initiators of the study are eleven organizations and associations in the German planning, construction and property sectors.