In building law, what defines the area included in GFA?

The correct answer is that the area included in Gross Floor Area (GFA) is defined as all floors including accessories. GFA is a crucial measurement used in building law and zoning regulations as it provides an understanding of the total area that is built upon within a building's footprint. This includes not only the main usable floors but also any accessory structures or spaces that are part of the building, such as stairways, elevators, and other areas that might be enclosed or partially enclosed.

In building law, this comprehensive measurement is important for determining compliance with zoning laws, calculating fees, and ensuring that developments meet safety and accessibility standards. By including all floors and their accessories, GFA accurately reflects the overall size and potential impact of a building on its surroundings. This complete inclusion helps municipal authorities and planners make informed decisions about land use and urban development, ensuring that buildings are appropriately sited and constructed according to the established regulations.