1.   The One- and Two-Family Residence District is established as one designed to provide for a medium density residential development. The specific intent of this section is:

      A.   To encourage construction and use of the area for single- and two-family dwellings.

      B.   To provide for medium density housing and the attendant rise in traffic on specific collector streets.

      C.   To prohibit commercial and industrial use of the land, and of any other use which would inhibit residential orientation of the area.

   2.   Principal Permitted Uses.

      A.   Any and all uses permitted under the R-1 classification.

      B.   Single-family dwellings.

      C.   Two-family dwellings.

      D.   Conversion of one-family dwellings into two dwellings in accordance with all lot area, frontage and yard requirements set forth in this section.

   3.   Accessory Uses.

      A.   Accessory uses permitted under the R-1 classification.

      B.   Customary home occupations, conducted entirely and solely by resident occupants in their place of abode; and provided that not more than one-half of the area of one floor be utilized for such purpose; further providing that said occupations require no external or internal structural alterations, or the use of mechanical equipment not customarily used in dwellings. Customary home occupations to be determined by Board of Adjustment.

      C.   Nursery schools, or child nurseries provided that the building be located not less than 20 feet from any other lot in any R district classification; provided that 30 square feet of usable interior floor space and 100 square feet of usable outdoor play space is provided for each child. The outdoor play space must be completely enclosed by a fence not less than four feet, nor more than six feet in height.

   4.   Area Regulations.

      A.   Lot Area. The minimum lot area shall be 8,400 square feet for single-family dwellings and 12,500 square feet for a two-family dwelling.

      B.   Lot Width. The minimum lot width shall be 66 feet for single-family dwellings and 90 feet for two-family dwellings.

      C.   Yard Width. The minimum front yard shall be 35 feet, the minimum rear yard shall be 30 feet for a dwelling and 45 feet for any other building. For two-family dwellings the total side yard requirement shall be not less than 20 feet, with the least side minimum being eight feet. For all other buildings other than two-family dwellings, lots 80 feet or more for each side yard and lots greater than 80 feet wide shall have a side yard equal to or greater than 10 percent of the overall lot width, for each side yard.

      D.   Building Height. The maximum building height shall be two and one-half stories, with the principal building height maximum of 35 feet. Accessory building height maximum shall be 12 feet.

      E.   Minimum Dwelling Dimensions. Neither the minimum overall width dimension nor the overall depth dimension of a single-family dwelling shall be less than 20 feet.