Land and buildings in the Low Density Residential District (R-1) shall be used only for the following purposes:
(a) Single-family Residence. There shall be no more than one principal structure per lot.
(b) Public and Private Schools. Public or private schools offering general educational courses and having no rooms regularly used for housing or sleeping of students.
(c) Parks. Open spaces, playgrounds, and other related program elements and park features intended to provide for passive amenities to the immediate or surrounding neighborhoods, while limiting site impacts.