International Standard Calculation Rules for Subarea

Learn the calculation rules applied to subareas when calculation factors are used.

Addition of subareas, equal which calculation factor

Unfinished Area (UA) = Unfinished Area + Subarea

Net Room Area (NRA) = Net Room Area + Subarea

Living Area (LA) = Living Area + Calculation Factor % x Subarea

Subtraction of subareas with calculation factor 100%

Unfinished Area (UA) = Unfinished Area - Subarea

Net Room Area (NRA) = Net Room Area - Subarea

Living Area (LA) = Living Area - Subarea

Subtraction of subareas with calculation factor 0% or 50% (≠100 %)

Unfinished Area (UA) = Unfinished Area

Net Room Area (NRA) = Net Room Area

Living Area (LA) = Living Area - Calculation Factor % x Subarea