Section 2-152 Floor Area or Gross Floor Area
2-152.A. Generally. “Floor area” or “gross floor area” means the sum of the gross horizontal areas of all floors of a building measured from the exterior face of framing of the exterior walls or from the centerline of walls separating buildings, plus the floor area projected over stair openings. Basement for cellar space in all zone districts shall not be counted as floor area except as follows:
2-152.A.1. When used for commercial purposes in a zone district other than Historic Commercial or Commercial where commercial uses are limited, either as a use by right or as a use permitted on review, basement or cellar space shall be included in the calculation of floor area permitted to be occupied by that use.
2-152.A.2. When calculating parking and affordable housing mitigation, cellar or basement space shall be included.
2-152.B. Residential, Hillside Transitional and Historic Residential Districts. In the Residential, Hillside Transitional and Historic Residential Districts, “floor area” or “gross floor area” shall mean the sum of the gross horizontal areas of all floors of a building measured from the exterior face of framing of the exterior walls or from the centerline of walls separating buildings, plus the floor area projected over stair openings. Floor area which is covered by a ceiling height, as measured from top of finished floor to ceiling, of greater than seventeen feet (17') shall be counted twice, regardless of the presence of a loft or interior ceiling. Floor area which is covered by a ceiling height, as measured from top of finished floor to ceiling, of less than five feet (5') shall not be counted.