170.17   R-4, MEDIUM-DENSITY RESIDENTIAL DISTRICT.
1.   Statement of Intent. The intent of the R-4 District is to establish and preserve a low to medium density residential neighborhood, free from other uses, except those which are compatible with and convenient to the residents of such a district.
2.   Principal Permitted Uses. A building or premises shall be used only for the following purposes:
A.   Residential, one to four unit dwellings.
B.   Accessory buildings and uses incidental to the principal use.
C.   Boarding and Lodging Houses.
D.   Any principal use permitted in the “R-2” District.
3.   Special Uses. The following special uses are permitted in the “R-4” District only in accordance with the provisions set forth hereinafter:
A.   Home Occupations.
B.   Public utility and public service installations and facilities excluding business offices and repair and storage facilities.
C.   Other compatible uses as determined by the Board of Adjustment after consultation with the Planning and Zoning Commission.
4.   Minimum Requirements. The following minimum requirements shall be observed:
A.   Lot Area: The minimum lot area shall be 4,800 sq. ft. for a single family dwelling, 7,000 sq. ft. for a two family dwelling; and for each unit over two, an additional 1,500 sq. ft. minimum.
B.   Yards:
(1)   The front yard shall be a minimum of 20 feet.
(2)   The side yard for single family dwellings and duplexes shall be a minimum of five (5) feet except on a corner lot. The street side yard for all buildings shall be a minimum of twenty (20) feet on the side abutting a street. Principal buildings other than the single family dwellings and duplexes shall have a minimum side yard of ten (10) feet. A garage attached to a dwelling may be located five (5) feet from the side lot line but not a street line.
(3)   The rear yard shall be a minimum of 10 feet. A garage attached to a dwelling may be located five (5) feet from an alley line.
5.   Off-Street Parking Requirements. Two per unit for one to four unit dwellings; and one additional parking space is required for each renter in a rooming or boarding house; and for all other permitted uses as required in Section 170.34.