Built-up area (BUA) is a term used primarily in urban planning, real estate development, building design and the construction industry. It encompasses the following:
A developed area, i.e. any land on which buildings and/or nonbuilding structures are present, normally as part of a larger developed environment such as:
developed land lot
rural area
urban area
suburban area
urban agglomeration
conurbation
A gross building area (construction area), as defined in BOMA standards for "computing, communicating and comparing the measurement of buildings by gross areas", namely:
Construction Gross Area (CGA)
Exterior Gross Area (EGA)
An illuminated section of a road—as defined by the United Kingdom's Highway Code—where speed limits are automatically applied.
