Floor space refers to the total surface area of a building, measured in square meters, including both the space within the exterior walls and specific structural components.
The gross area includes the area encompassing stairwells and elevator shafts, but excludes balconies and roof terraces. For commercial spaces, such as offices, the rentable floor area is calculated, subtracting unusable parts like glass openings.
The term net floor area includes all usable interior spaces except certain building elements such as large shafts or low ceilings. Tare surface refers to the difference between gross and net surfaces.
Usable area is synonymous with net floor area.
