To encourage good land and building site design, to encourage and allow flexibility in dwelling types and design but subject to the general density of the applicable zoning district with respect to the total area to be developed under this procedure, and to permit the grouping of open space and such accessory facilities as garages or parking spaces, planned development for residential purposes shall be permitted by special use permit in R-1, R-2, R-3L  and R-3H Districts.
   (A)   General provisions.
      (1)   The dwelling types, minimum lot area, yard, height, and accessory uses shall be determined by the requirements and procedures set forth below which shall prevail over conflicting requirements of this chapter or Chapter 52 governing the subdividing of land.
      (2)   The dwelling group project is to be planned and developed as an integral unit.
      (3)   The proposed development shall follow all applicable procedures, standards and requirements of the subdivision regulations.
   (B)   Uses permitted.
      (1)   One-family dwellings.
      (2)   Two-family dwellings.
      (3)   Multiple-family dwellings of a character and density similar to and including garden apartments, terrace apartments, row and town houses.
   (C)   Site development requirements.
      (1)   No planned unit residential development shall be authorized with a gross site area of less than two acres.
      (2)   The number of dwelling units permitted shall be determined by dividing the net development area by the minimum lot area per family required in the District where the development is located.
      (3)   All buildings, including accessory buildings, shall not occupy more than 25% of the net development area.
      (4)   The maximum building height of the development shall be 35 feet.
      (5)   Off-street parking spaces shall be provided for each dwelling unit in accordance with §§ 155.340 through 155.345.  Such parking shall be so placed on the development site as not to interfere with the required useable open space.  Such parking shall be so placed on the development site as not to interfere with the required useable open space.  Such parking shall be for the sole use of the occupants of the buildings; visitors' parking shall be provided in addition thereto as may be deemed desirable by the Planning Commission.
      (6)   Group housing developments shall maintain the following yard requirements:
         (a)   Yards facing streets shall be no less than the average of the setback of other developed parcels on the block but no less than 35 feet.
         (b)   Side yards on the development boundary property line shall be not less than 20 feet.
         (c)   The rear yard on the development boundary property line shall be not less than 40 feet.
         (d)   Accessory uses such as garages, carports, and parking areas for more than four vehicles shall be located no closer to the development property line than ten feet.  Where a parking area with a capacity of four or more vehicles adjoins a residential district, a vertical screen four feet to eight feet in height consisting of structural or plant materials shall be erected and maintained between the parking area and the adjoining property.
   (D)   Design requirements.
      (1)   The front of one dwelling shall not face upon the rear of another.
      (2)   Between buildings, from front to front or rear to rear, the minimum horizontal distance shall be 50 feet for buildings one story in height, 55 feet for buildings two stories in height, and 60 feet for buildings three stories in height.  The minimum distance between buildings may be decreased at one side by not more than ten feet if the distance on the other side is proportionately increased.
      (3)   Dwellings comprising a group may face one another across an open court, provided the width of such court meets the front to front minimum horizontal distance requirements above.
      (4)   No court completely enclosed by structures shall be permitted.
      (5)   Between ends of buildings the horizontal distance shall not be less than 20 feet.  When the end of one building is opposite the long dimension of another building the minimum horizontal distance between them shall be 35 feet.
      (6)   The number of dwelling units in any row structure shall be no more than six.
      (7)   The development shall have within its boundaries no secondary or primary thoroughfare.
      (8)   Useable open space shall comprise 20% of the development area.  All common open space shall be maintained in good condition.  This common open space shall have no dimension less than 40 feet.
(Ord. 616, passed 9-23-2013)