The net surface area is a very important factor when determinating rental charges
If this figure is not listed in your tenancy contract and cannot be found out otherwise, we recommend you measure the area of your apartment yourself. Please bear the following in mind when carrying out measurements:
- The net surface area comprises all apartment areas, thus including stairways within the apartment and does not take inside or outside walls into account.
- We recommend making measurements at a height of 1.5 metres in rooms with walls on a slope.
- Do not measure unheated (unfitted) rooms such as attic and basement storage rooms, terraces, balconies or garden areas.
The net surface area is not generally defined. Instructions listed above are according to the apartment evaluation system WBS (Band 69, Schriftenreihe Wohnungswesen- Bundesamt für Wohnungswesen).