196.03 EXCEPTIONS AND MODIFICATIONS.
1.   Existing Lots of Record – Yard Requirements. In any district where dwellings are permitted, a single-family dwelling may be located on any lot or plot of official record, recorded prior to the effective date of the Zoning Ordinance, irrespective of its area or width; provided, however, if two or more lots or plots with continuous frontage in single ownership were of record prior to the effective date of said ordinance, such lots shall be considered buildable only in combinations that most nearly approximate the lot width and area requirements of the district in which located. The following yard requirements shall apply:
   A.   The sum of the side yard widths of any such lot or plot shall not be less than thirty percent of the width of the lot, but in no case less than ten percent of the width of the lot for any one side yard.
   B.   The depth of the rear yard of any such lot need not exceed twenty percent of the depth of the lots, but in no case less than 20-feet.
2.   Yard Setback Exceptions. Exceptions to the required setbacks may be modified as follows:
   A.    All zone districts.
      (1)    Front Yard. Usual steps.
      (2)    Rear Yard. Elevated docks and usual steps.
      (3)    Side Yard. Elevated docks, air conditioning and/or heating units, and usual steps.
   B.   Residential Districts Only.
      (1)    Front Yard. Decks less than 36-inches in height which project not more than ten-feet into the required yard.
      (2)    Rear Yard. Unenclosed, above and below, decks which project not more than 12- feet into the required rear yard.
      (3)    Side Yard. Egress window wells and chimneys provided a chimney does not project more than two feet (2’) into the required side yard setback.
3.   Residence Districts – Inaccessible Water and Sewer Lines. In any residence district where neither a public water supply nor a public sanitary sewer is accessible, the lot area and frontage requirements shall be as follows: lot area, one acre; lot width at building line, 130-feet. However, where a public water supply system is accessible, these requirements shall be one-half acre and 100-feet respectively.
4.   Approved Plats Not Meeting Minimum Requirements. In the event a plat which has been approved has one or more lots that do not meet the minimum requirements for the district in which located, the following exceptions shall apply:
   A.   Front Yard – same as specified for the district in which located.
   B.   Lot Width and Side Yard – No lot shall be approved for building purposes having a width less than 55-feet, except as otherwise provided in this Zoning Ordinance. Side yards shall be the same as specified for the district in which located.
   C.   Rear Yard – The rear yard may be reduced proportionately to the variance permitted from standard lot size, which will be 125-feet of depth for the purpose of this section.
5.   Through Lot Buildings – Front Yard Requirement. Principal buildings on through lots extending through from street to street shall at a minimum provide the required front yard on both streets. In residential zone districts, one yard shall be defined as the rear yard (see Section 191.06).
6.   Yards – Unobstructed Opening to the Sky. Every part of a required yard shall be open to the sky unobstructed with any building or structure, except for permitted accessory buildings in a rear yard and for the ordinary projections of sills, belt courses, cornices and ornamental features in side and rear yards projecting not to exceed 24-inches.
7.   Side Yards – Mixed-Use Requirements. In instances where buildings are erected containing two or more uses housed vertically, the required side yards for the first floor use shall control.