The basis for area calculation measurement is for planning applications and approvals, ratings of warehouses and industrial buildings, building cost for residential property for insurance purposes and for marketing and valuation of any commercial and industrial buildings including offices, department stores, food superstores, etc.
GIA, NIA OR IPMS
- The RICS code of measuring practice contains a hierarchy of definitions and the core definitions are:
Gross External Area (GEA)
- The area of the building measured externally at each floor level.
Gross Internal Area (GIA)
- The area of a building measured to the internal facade of the perimeter at each floor level.
Net Internal Area (NIA)
- The usable area within a building measured to the internal facade of the perimeter walls to each floor level.