In the housing policy debate around new housing, immigration, shortage of housing and urban sprawl, the issue of vacancy rarely plays a role. The vacancy rate offers important insight into the state of housing shortage in individual regions. However, a generalised view of the data alone does not help in the analysis of vacancy figures. The mutual interactions are far too complex, for example, when it comes to the regionally very different imbalance between supply and demand or migration movements from the A and B cities to more rural areas.