§ 159.24  (D) DUPLEX RESIDENTIAL DISTRICT.
   (A)   Purpose.
      (1)   This district is an obsolete, inactive district with legal nonconforming status. The city may not accept zoning applications for this district. Legal nonconforming structures in this district are subject to the regulations herein, which are retained in this code for enforcement purposes.
      (2)   The Duplex Residential District is established to provide adequate space and site diversification, duplex type residential development with two dwelling units per lot, and almost twice the density of a typical single-family development, and to adjust the area requirements accordingly.
      (3)   Duplex type development is a low to medium density use, and additional requirements for streets, water, and fire protection, wastewater, drainage, and adequate open space shall be met before development to such use.
      (4)   Duplex developments are not necessarily a buffer between single-family and commercial uses, and should be properly buffered from nonresidential traffic, or from pollution and/or environmental hazards.
   (B)   Permitted uses.
      (1)   Agricultural uses on unplatted land in accordance with other adopted ordinances;
      (2)   One single-family detached dwelling must meet the requirements of the SF-15 District;
      (3)   One duplex on a lot with fire retardant walls, separate utility meters, and separate sewer lines;
      (4)   One accessory building not larger than 120 square feet of floor area, nor taller than ten feet in height, used as an accessory to a residential use on the same lot;
      (5)   Accessory buildings not larger than 100 square feet of floor area, nor taller than ten feet in height, used as an accessory to a residential use on the same lot;
      (6)   Temporary real estate sales offices located on property being sold, limited to the period of sale with a two-year initial period and one-year extension being authorized by the Planning and Zoning Commission, such offices to be maintained at all times;
      (7)   Temporary on-site construction offices, limited to the period of construction, with a two-year initial period and one-year extension being authorized by the Planning and Zoning Commission, such offices to be maintained at all times;
      (8)   Paved automobile parking areas which are necessary to the uses permitted in this district;
      (9)   All municipality owned or controlled facilities, utilities, and uses;
      (10)   Private residential swimming pools as an accessory to a residential use;
      (11)   Home occupations;
      (12)   Private unlighted residential tennis counts on the same lot as an accessory to a residential use;
      (13)   Temporary concrete batching plants limited to the period of construction, upon approval of location and operation by the Building Official; and
      (14)   Public, denominational and private schools, churches, and public parks essential to create basic neighborhood units.
   (C)   Conditional uses: (require use permits, see § 159.43).
      (1)   Associated recreation and/or community clubs;
      (2)   Facilities for those utilities holding a franchise in the city;
      (3)   Private residential tennis court used as an accessory to a residential use if not located on the same lot or utilizing lights;
      (4)   A driveway or crosswalk way, as distinct from a dedicated street, to provide access to premises in a commercial or industrial district; and
      (5)   Agricultural use.
   (D)   Prohibited uses.
      (1)   Any building erected or land used for other than one or more of the preceding specified uses;
      (2)   The storage of equipment, material, or vehicles, including abandoned vehicles, which are not necessary to the uses permitted in this district;
      (3)   Any use of property that does not meet the required minimum lot sizes; front, side, and rear yard dimension and/or lot width; or exceeds the maximum height, building coverage, or density per gross acre as required; and
      (4)   Day care centers.
   (E)   Area requirements.
      (1)   Single-family detached units shall meet the area requirements of the SF-15 District;
      (2)   Minimum lot area: 15,000 square feet;
      (3)   Maximum number of single-family attached dwelling units per lot: two;
      (4)   Minimum square footage per each attached dwelling unit: 1,200 square feet;
      (5)   Minimum lot width: 90 feet at front building line;
      (6)   Minimum lot depth: 175 feet;
      (7)   Minimum depth of front setback: 30 feet;
      (8)   Minimum depth of rear setback: 25 feet;
      (9)   Minimum width of side setback:
         (a)   Abutting structures separated by fire retardant walls: 0 feet;
         (b)   Internal lot: ten feet; and
         (c)   Side yard setback abutting street: 20 feet;
      (10)   Minimum distance between buildings on the same lot or parcel of land: 15 feet;
      (11)   Minimum length of driveway pavement from the public right-of-way on a side or rear yard: 20 feet;
      (12)   Maximum height of structures: 35 feet;
      (13)   Maximum building coverage as a percentage of lot area: 45% of lot area; and
      (14)   Minimum number of paved parking spaces required for:
         (a)   Each attached residential dwelling unit: two spaces (an enclosed garage shall not be considered in meeting the off-street parking requirements); and
         (b)   All other uses: see §§ 159.60 through 159.68.
(2005 Code, § 12-2-5)  (Ord. 000615, passed - -; Ord. 181211B, passed 12-11-2018)