1381.10  PLANNED RESIDENTIAL DEVELOPMENTS.
   Planned Residential Developments include residential uses of all types which are located on a tract of land at least ten acres in size which is planned for development in its entirety under single ownership or control. Such residential large-scale developments may be permitted by the Board for the purpose of encouraging a flexibility of design which will result in an integrated site plan designed to benefit the residents or occupants of such development and neighborhood  properties, in compliance with the following regulations:
   (a)    The PRD shall consist of either single-family, two-family or multi-family dwellings, or a combination thereof, and accessory uses, provided that the average number of square feet of land area per dwelling unit, excluding streets, shall comply to at least seventy-five percent (75%) of the requirements set forth in Section 1349.01 .
   (b)    The prospective developer shall demonstrate that sufficient market exists for the type, size and character of development proposed.
   (c)    Adequate, safe and convenient pedestrian and vehicular circulation facilities, including roadways, driveways, off-street parking and loading, sidewalks, malls and landscaped areas to serve the development shall be provided.
   (d)    Paving and drainage facilities shall be designed to adequately handle storm waters, prevent erosion and the formation of dust.
   (e)    Signs and lighting devices shall be properly arranged to avoid conflicts with residential use.
   (f)    The orientation of buildings shall provide adequate light, air and open space, and shall conform with the following regulations:
      (1)    In buildings containing multiple dwelling units, walls containing main window exposures or main entrances, shall be so oriented as to insure adequate light and air exposures.
      (2)    Such buildings shall be so arranged as to avoid undue exposure to concentrated loading or parking facilities, and shall be so oriented as to preserve visual and aural privacy between  adjacent buildings.
      (3)    A building wall exposing both windows and an entrance way shall be located no closer to another building than a distance equal to the height of the taller building of the two, but in no case less than fifty feet.
      (4)    A building wall exposing only windows or only an entrance way shall be located no closer to another building than a distance equal to the height of the taller building of the two, but in no case less than twenty-five feet.
      (5)    A building group may not be so arranged that any temporary or permanently inhabited building is inaccessible by emergency vehicle.
   (g)    Open space suitable for use as play area for children or as outdoor living space for families shall be provided in amounts not less than 500 square feet per dwelling unit for single-family and two-family dwellings, and 300 square feet per dwelling unit for multi-family units. In addition, public open space amounting to at least five percent (5%) of the land area of the tract shall be reserved for use as buffers, landscaped areas, wooded areas or other forms of open space designed to enhance the attractiveness and livability of the development.
   (h)    Residential uses may include compact integrated retail and service shopping facilities which are designed to serve the development or other nearby residential area, provided that such integrated shopping facilities comply with the special use requirements of Section 1381.03 .
   (i)    All areas devoted to utility purposes, such as garbage storage area, common washing or drying facilities and other such areas, shall be adequately screened. (12-17-79)