The district regulations for the R-3 Multi-Family Residential District are as follows:

   1.   Permitted Principal Uses and Structures. Following are the principal uses and structures permitted in the R-3 Multi-Family Residential District:

      A.   Uses permitted in the R-2 District.

      B.   Medical clinics, funeral homes, and mortuaries.

      C.   Multiple-family dwellings with not more than 16 dwelling unites in one building.

      D.   Community meeting or recreation buildings.

      E.   Parks, playgrounds or playfields.

      F.   Elementary or secondary schools.

      G.   Private kindergartens and day nurseries.

      H.   Churches and other places of worship.

      I.   Funeral parlors.

      J.   Public housing developments.

      K.   Rooming or boarding houses.

      L.   Nursing, convalescent and retirement homes.

   2.   Permitted Accessory Uses and Structures. Following are the permitted accessory uses and structures allowed in the R-3 Multi-Family Residential District:

      A.   Private garages. In addition, a detached private garage over 1,500 square feet shall be required to have approval from the Board of Adjustment.

      B.   Private swimming pools and tennis courts.

      C.   Private greenhouses not operated for commercial purposes.

      D.   Uses and structures clearly incidental and necessary to the permitted principal uses or structures of this district, not involving the conduct of business on the premises, except home occupations not employing any person outside the immediate family and located on the same lot or a contiguous lot under the same ownership.

      E.   Temporary buildings used in conjunction with construction work, provided that such buildings are removed promptly upon completion of the construction work.

   3.   Special Exception Uses and Structures. Subject to subsection 2 of Section 168.13 and the other requirements contained herein, the Board may permit the following special exception uses and structures:

      A.   Medical clinics; sanitariums, rest, nursing and convalescent homes; homes for orphans and aged on sites of one acre or more, provided that yards comparable for other institutional uses of this Zoning Code are provided and that off-street parking of not less than one space for every three beds plus one space for every two employees is provided.

      B.   Railroads and public utilities, but not including equipment storage or maintenance yards and buildings or general administrative and sales offices, provided that any substation or building shall meet the front and rear yard requirements for a dwelling and shall provide side yards of not less than 25 feet and that two parking spaces per substation or one per employee at the site be provided.

   4.   Minimum Lot Area and Width. Following are the minimum lot area and width requirements for the R-3 Multi-Family Residential District:

      A.   Single-family dwelling:

         (1)   Area – 6,000 square feet.

         (2)   Width – 60 feet.

      B.   Two-family dwellings and single-family semi-detached dwellings:

         (1)   Area - two-family, 9,600 square feet; semi-detached, 4,800 square feet.

         (2)   Width – two-family, 70 feet; semi-detached, 35 feet.

      C.   Multi-family dwelling:

         (1)   Area – 10,000 square feet for 3 units plus 2,500 square feet for each additional unit.

         (2)   Width – 80 feet.

   5.   Minimum Required Front, Side and Rear Yards. The minimum requirements for front, side and rear yards in the R-3 Multi-Family Residential District are as follows:

      A.   Dwellings and other non-institutional uses:

         (1)   Front – 25 feet.

         (2)   Rear – 25 feet.

         (3)   Side – single-family dwellings and two-family dwellings, 7 feet; three-family or larger, 7 feet

         (4)   Street side, corner lot – 20 feet.

      B.   Schools, churches or other public or semi-public buildings:

         (1)   Front – 35 feet.

         (2)   Rear – 35 feet.

         (3)   Side – 20 feet.

         (4)   Street side, corner lot – 25 feet.

   6.   Maximum Height. The maximum height for structures in the R-3 Multi-Family Residential District is 2½ stories or 35 feet.

   7.   Permitted Signs. Permitted signs in the R-3 Multi-Family Residential District are as follows:

      A.   Name plates attached flat against the wall of the main building not to exceed three square feet in area.

      B.   Church or public bulletin boards located only on the premises to which they refer, not to exceed 12 square feet in area.

      C.   Temporary signs advertising the lease or sale of the premises not to exceed six square feet in area.

      D.   Illumination of signs, bulletin boards and name plates shall not exceed 60 watts and shall be lighted only with indirect, non-intermittent lighting.

      E.   Signs and bulletin boards shall be at least 20 feet from the front lot line or not more than five feet in front of the main building.

      F.   All signs shall be maintained in a neat and presentable condition and in the event their use shall cease, they shall be promptly removed and the surrounding area restored to a condition free from refuse and rubbish.

      G.   Any sign not conforming to these provisions shall be made to conform or be removed.

   8.   Minimum Width Regulation. The minimum dimension of the main body of the principal building shall not be less than 24 feet.

   9.   Perimeter Foundation Requirement. A permanent perimeter foundation, meeting the Story City Building Code standards, shall be required for all principal buildings.

   10.   Off-Street Parking and Loading. Spaces for off-street parking and loading shall be provided in accordance with the provisions of Section 166.21(14).

   11.   Site Plan Requirements. See Section 166.21(16).

   12.   Maximum Building and Site Coverage. No lot in the R-3 Multi-Family Residential District may have building coverage of more than 60 percent by area. No lot in the R-3 Multi-Family Residential District may have site coverage of more than 80 percent by area.