A. Use As Building Site: Any lot or parcel of land in any district that was under separate ownership and of record on the effective date hereof, or amendment thereof, where no adjoining undeveloped land fronting on the same street was under the same ownership on said date, may be used as a building site even though such lot or parcel fails to meet the minimum requirements for lot area, lot width, or both, that are generally applicable to lots in the district. With respect to such lots, yard dimensions, and other requirements not involving lot area or width shall be complied with, subject to subsections B and C of this section.
B. Side Yard Requirements: On any such lot or parcel, the side yard requirements of these regulations shall not operate to reduce the net buildable width of such lot below thirty eight feet (38'); provided, however, that the application of this exception shall not be permitted to reduce:
1. Any interior side yard below ten percent (10%) of the width of the lot; or
2. Any exterior side yard below twenty percent (20%) of the width of the lot or eight feet (8'), whichever is greater.
C. Reduction Of Net Buildable Depth: On any such lot or parcel, no combination of the following requirements shall operate to reduce the net buildable depth of such lot below seventy feet (70'):
1. Front and rear yard;
2. Front and/or rear building setback; provided, however, that the application of this exception shall not be permitted to reduce:
a. Any front yard below ten percent (10%) of the depth of the lot; or
b. Any rear yard below fifteen percent (15%) of the depth of the lot, or ten feet (10'), whichever is greater. (1985 Code ch. 16 § 9-1)