23.106.030 Floor Area, Gross.
A. Gross Floor Area Defined. Gross floor area means the total gross horizontal areas of all floors of a building or enclosed structure.
B. Basements and Cellars. Gross floor area includes usable basements and cellars that are either:
1. Below the roof and within the outer surface of the main walls of a main or accessory building (or the centerlines of party walls separating such buildings or portions of buildings); or
2. Within lines drawn parallel to and 2 feet within the roof line of any building or portion of a building without walls.
C. Access Features in Multi-Story Buildings. For a multi-story building with a covered or enclosed stairways, stairwells, or elevator shafts, the horizontal area of these features is counted only once at the floor level of their greatest area of horizontal extent.
D. Excluded Areas. The following areas are excluded from gross floor area calculation:
1. Covered or uncovered areas used for off-street parking or loading spaces.
2. Driveways ramps between floors and maneuvering aisles of a multi-level parking garage.
3. Mechanical, electrical, and telephone equipment rooms below finished grade.
4. Areas which qualify as usable open space.
5. Arcades, porticoes, and similar open areas for non-residential uses which are:
(a) Located at or near street level;
(b) Accessible to the general public; and
(c) Are not designed or used as sales, display, storage, service, or production areas.
6. The floor area associated with any existing or proposed accessory dwelling unit or junior accessory dwelling unit, up to 800 square feet per lot. See 23.306 Accessory Dwelling Units.
E. Covered Pedestrian Access Features for Non-Residential Uses. For non-residential uses, gross floor area includes pedestrian access interior walkways or corridors, or interior courtyards, walkways, paseos or corridors covered by a roof or skylight.
F. Mezzanines. Gross floor area includes the floor area of a mezzanine. (Ord. 7888-NS § 5, 2023: Ord. 7787-NS § 2 (Exh. A), 2021)