The following are permitted uses in the SF3 Single-Family Residential (5,600 square feet) District, pursuant to any additional standards set forth herein.
   A.    Dwelling units, single-family detached.
   B.    Parks and playgrounds, public.
   C.    Residential care homes for four (4) to eight (8) unrelated individuals, provided that no residential care home be located closer than five hundred (500) lineal feet, exclusive of streets and alleys, to an existing residential care home on the same or intersecting streets.
   D.    Schools, primary and secondary, public.