Definition: floor area ratio (General Definition)
"Floor area ratio" is the total floor area on a zoning lot , divided by the lot area of that zoning lot . If two or more buildings are located on the same zoning lot , the floor area ratio is the sum of their floor areas divided by the lot area . (For example, a zoning lot of 10,000 square feet with a building containing 20,000 square feet of floor area has a floor area ratio of 2.0, and a zoning lot of 20,000 square feet with two buildings containing a total of 40,000 square feet of floor area also has a floor area ratio of 2.0)