"Story"means that portion of a building included between the upper surface of a floor and the upper surface of the floor or roof next above it or, if no floor above it, the space between a floor and the ceiling next above it. A story is measured as the vertical distance from top to top of two successive tiers of beams or finished floor surfaces and for the topmost story, from the top of the floor finish to the top of the ceiling joists or, where there is no ceiling, to the top of the roof rafters.
A story containing one or more mezzanines has more than one floor level. If the finished floor level directly above a basement or unused under-floor space is more than six feet above grade for more than 50 percent of the total perimeter or is more than 12 feet above grade at any point, the basement or unused under-floor space shall be considered as a story; provided, that the following shall not be deemed a story:
A. A basement or cellar if the height from finished grade at the exterior perimeter of the building to the finish floor elevation above is six feet or less for at least 50 percent of the perimeter and does not exceed 12 feet above grade at any point;
B. An attic or similar space under a gable, hip, or gambrel roof, the wall plates of which on at least two opposite exterior walls are not more than two feet above the floor of such space.
(Ord. 979 § 2 (Exh. A), 1990; Ord. 07-1284 § 3 (Exh. B), 2007; Ord. 23-1509 § 10, 2023)