Different area calculations in different locations?

The different area calculation methods are summarized under DIN 277. This norm draws a distinction between gross floor area (GFA), net building area (NBA) and areas that are leased in accordance with gif, an area definition specified by Gesellschaft für Immobilienforschung (German Association for Real Estate Research). These methods differ in the type of measurement, in the approach used and by which areas are measured. Approximate criteria are as follows:

GFA – all surfaces are measured from the shell on one side of a building to the shell on the opposite side, including shafts and structural columns or walls.

NBA – all construction areas are eliminated from the GFA

gif – roughly equivalent to NFA

Please note: With the 2016 amendment, the term “net floor area (NFA)” was changed to “net building area (NBA)” and “usage area (UA)” was changed to “useable area (UA)”.

Depiction of space calculation pursuant to DIN 277-1: 2016-01