§ 154.31 ACCESSORY USES.
   Any accessory use shall be deemed permitted in a particular zoning district if such use:
   (A)   Meets the definition of “accessory use” found in § 154.07;
   (B)   Is accessory to a principal structure or use that is allowed in a particular zoning district as a permitted or special use; and
   (C)   Is in compliance with the restrictions set forth as follows:
      (1)   Height: No accessory use shall be higher than
         (a)   Fifteen feet in any residential district; or
         (b)   Twenty-five feet in any other zoning district except the Rural Agricultural District where, due to the special needs of farm operations, there shall be no height limit on accessory structures.
      (2)   Setbacks: no accessory use shall be located in any part of a required yard excepting that in residential zone districts, an accessory use may be located as close as three feet to a side or rear lot line when said structure is also located on the rear one-third of the subject lot.
      (3)   Yard coverage: in any residential district, accessory uses shall not cover more than 30% of a required rear yard.
      (4)   Use as a dwelling: use of an accessory structure as a dwelling is prohibited in the city.
(1975 Code, § 32-III-12)