10-1-8-2: MANNER OF COMPUTING SQUARE FOOTAGE:
In the calculation of the floor area, the exterior dimensions shall be used. The total floor area shall be the total of the area of all floors of the building, except as follows:
   A.   Attic spaces which do not have an interior wall finish.
   B.   Unfinished parts of basements in a single-family, two- family or apartment occupancy. (1978 Code § 4-1-3)