What is GEA?
Area of a building measured externally at each floor level?
What is GIA?
Area of a building measured to the internal face of the perimeter wall at each floor level
What is NIA?
The area of usable space measured to the internal face of the perimeter wall at each floor level
Where are the definition of GEA / GIA / NIA defined?
RICS Code of Measuring Practice 6th Edition
What is the purpose of the RICS Code of Measuring Practice?
Provides precise definition
Consistent measurement of buildings