Brief definition
Living area under WoFlV is derived from usable floor area, with defined deductions (e.g. certain ancillary areas, basements, sloping ceilings below minimum height).
Distinction from BGF and NRF
- BGF: Gross, incl. bounding components
- NRF: Usable floor area per WoFlV parts
- Living area: Specific metric for residential use (rent, subsidies, market comparison)
Normraum relevance
Normraum calculates the living area per room under WoFlV directly from the as-built plan – deterministically, with the norm reference, a confidence score and the source reference in the check log – and lists it in the room book next to room number and use. What the floor plan does not show (room heights, fit-out condition) remains professional sign-off. Uncertain detections and incomplete dimension chains are flagged in the check log: that is where a survey is needed; Normraum does not replace it.