A. Measurement—Generally. Floor area ratio (FAR) maximums are applied to buildings in the R-1 zone and all nonresidential zones. The floor area of a building consists of the sum of the gross horizontal areas of all floors of a building or other enclosed structure, measured from the outside perimeter of the exterior walls and/or the centerline of interior walls. In a mixed-use building, floor area ratio maximums apply to both the residential and the nonresidential components of the development.

B. Single-Unit Residential Floor Area. The floor area for single-unit dwellings shall be measured as the total horizontal floor area of all the floors of a building from the outside walls. The total horizontal floor area shall include the residential floor area of any building(s) located on the lot including the main dwelling, detached accessory structures, all garage area except as exempted below, and enclosed patios. The following shall be excluded from floor area for the purposes of calculating floor area ratio:

C. Nonresidential Floor Area. The floor area shall include the total horizontal floor area of all the floors of a building measured from the outside walls, exclusive of vents, shafts, courts, elevators, stairways, mechanical, electrical, and communications equipment, and similar facilities. Floor area shall include mezzanine and lofts. The following shall be excluded from floor area for the purposes of calculating floor area ratio.