rakennusvolyymi

Rakennusvolyymi is a Finnish term referring to the building volume—the three‑dimensional measure of a building defined by the outer envelope of the structure. It represents the total space enclosed by external walls, floors, and the roof, and in many planning contexts can include spaces inside the envelope such as basements, mezzanines, and attics. The concept is used to express the mass or bulk of a building on a site, and to regulate density, skyline impact, and urban form in zoning and permitting processes.

Calculation of rakennusvolyymi is typically based on the volume of all spaces within the external perimeter of the building. In simple shapes, it can be approximated as the footprint area multiplied by an average building height. In practice, modern projects often rely on CAD or BIM models to compute the exact volume, and different jurisdictions may specify whether underground volumes or enclosed voids are included or excluded.

Rakennusvolyymi is distinct from area-based measures such as kerrosala (gross floor area) or net usable floor space. While floor area describes horizontal extent, the volume quantifies vertical space and mass. The volumetric measure is particularly relevant for planning decisions, massing studies, energy simulations, wind effects, and urban design evaluations.

Nuances exist because measurement conventions vary by country and by local regulations. Clear documentation of what is included in the volume (for example, whether basements or mezzanines are counted) is essential in Finnish planning practice.