Brief definition
Basement and ancillary rooms under WoFlV are treated differently when determining usable and living area — depending on usability, height, and residential purpose.
Typical cases
- Fully usable basement dwellings vs. pure utility cellars
- Utility and plant rooms
- Deductions below minimum height or for certain uses
Normraum relevance
Normraum lists basement and ancillary rooms in the room book as rows of their own with use, area, confidence score and source reference. That keeps visible what § 2 WoFlV excludes from living area – and what is still needed as usable area for CAFM, service charges or cleaning estimates. Assignment to residential purpose remains professional sign-off.