1163.02 NONCONFORMING VACANT LOTS.
   (a)   Single Nonconforming Vacant Lots in Residential Districts. In any district where dwellings are permitted, a one family detached dwelling may be erected on any lot of official record as of the effective date of the Zoning Ordinance, notwithstanding limitations imposed by other provisions of the Zoning Ordinance. Such lot must be in separate ownership and not of continuous frontage with other lots in the same ownership. This provision shall apply when by reason of its lot area, width, or depth it does not meet minimum requirements for a lot under these regulations, provided, however, that no lot shall be deemed to be less than forty feet wide for the calculation of yard requirements and provided, further:
      (1)   The sum of the side yard widths on any such lot of record shall be at least twenty-five percent (25%) of the width of the lot.
      (2)   In no case shall the width of any side yard be less than ten percent (10%) of the width of the lot, except that on a corner lot, the width of side yard adjoining the side street lot line shall not be less than ten feet.
      (3)   The depth of the rear yard of any such lot need not exceed twenty percent (20%) of the depth of the lot, but in no case shall it be less than twenty feet.
      (4)   If the width of such lot meets the standards of the Zoning Ordinance but the depth is such that the total area is less than 10,000 square feet, the rear yard for such lot shall have a minimum of thirty percent (30%) of the depth of the lot but in no case shall it be less than thirty feet.
   (b)   Nonconforming Lot of Record in Combination. If two or more lots or combinations of lots and portion of lots with continuous frontage in single ownership are of record at the time of passage or amendment of the Zoning Ordinance and if all or part of the lots do not meet the requirements for lot width and area, the land involved shall be considered to be an undivided parcel for the purpose of the Zoning Ordinance and no portion of such parcel shall be used or sold in a manner which diminishes compliance with lot width and area requirements established by the Zoning Ordinance, nor shall any division of any parcel be made which creates a lot with width or area below the requirements stated in the Zoning Ordinance.
   (c)   Nonconforming Vacant Lots in Other Districts. In any district, other than a Residential District, a building designed for any permitted use in such district may be erected on any lot of official record as of the effective date of this Zoning Ordinance provided that:
Such building shall comply with all regulations applicable in the district in which the lot in question is located, provided, however, the width of any required side yard need not be greater than that derived by applying the following equation, where "X" = the required side yard width:
 
               Minimum side yard required
              X    =   by district regulations   
   actual lot width      minimum lot width required
               by district regulations
   (Ord. 74-8. Passed 10-3-74.)