In R-3 Residence Districts, no building or other structure or land shall be used and no building or other structure shall be built for any purpose other than:
A. 
A use permitted in the R-1 and R-2 Residence Districts (see §§ 215-13 and 215-17).
B. 
Two-family.
C. 
Multifamily.
Conditional uses in the R-3 District shall be those conditional uses permitted in the R-1 Residence Districts, subject to the same provisions.
A. 
Area per dwelling unit and lot dimensions.
(1) 
For a single-family dwelling, the minimum land area shall be 7,500 square feet and the minimum width of the lot at the front building line shall be not less than 60 feet. However, this shall not apply to prevent the construction of a single-family dwelling on a lot existing prior to the date of enactment of this chapter and not adjoined at the side by another unoccupied lot or other unoccupied land in the same ownership having an area of not less than 5,000 square feet.
(2) 
For a two-family dwelling or a pair of semidetached dwellings, the minimum land area shall be 9,000 square feet, and the minimum width of the lot at the front building line shall not be less than 75 feet or the distance necessary to provide the side yards specified below, whichever is greater.
(3) 
For a dwelling containing three or four dwelling units, the minimum land area per dwelling unit shall be 3,000 square feet, and the minimum width of the lot at the front building line shall not be less than 85 feet or the distance necessary to provide the side yards specified below, whichever is greater.
(4) 
For a dwelling containing more than four dwelling units, the minimum land area per dwelling unit shall be 2,600 square feet and the minimum width of the lot at the front building line shall not be less than 85 feet or the distance necessary to provide the side yards specified below, whichever is greater.
B. 
Front yards. Front yards shall be determined in the same manner as set forth in § 215-15, and the building setback lines established by § 215-56 shall take precedence.
C. 
Rear yards. Rear yards shall be the same as for R-1 Residence Districts as set forth in § 215-15.
D. 
Side yards.
(1) 
For a single-family residence, there shall be two side yards with a total width of not less than 16 feet, and no one side yard shall be less than eight feet in width.
(2) 
For a two-family dwelling, there shall be two side yards with a total width of 16 feet, and the minimum width of one side yard shall be not less than eight feet.
(3) 
For each semidetached dwelling, there shall be a side yard of not less than eight feet.
(4) 
For dwellings of three or more dwelling units, there shall be two side yards with a total width of not less than 20 feet, plus four additional feet for each dwelling unit in excess of three contained in the building. The width of the narrower of the two side yards shall not be less than eight feet. However, any side yard width in excess of 60 feet accumulated under the above schedule may be applied as additional widths for one or more outer courts which to start with are not less than 36 feet wide and 38 feet deep.
(5) 
For nonresidential structures, the side yard requirements are the same as those set forth in § 215-15.
E. 
Corner lots. In the case of a corner lot, the yard abutting the street considered to be the front street shall be considered the front yard and shall be determined as provided in § 215-15F. No building other than a detached garage or other accessory building may extend more than 10 feet closer to a side street line than the setback line for buildings along a street considered to be the side street. The yards other than those abutting street lines shall be considered as side yards and shall be determined by Subsection D of this section.
F. 
Height. The height of dwellings shall not exceed four stories or 50 feet.
The requirements shall be as set forth in § 215-16.
Refer to Article XVII.