Sec. 9-4.303.  Additional sub-zones.
   (a)   Additional sub-zones may be established for the R-1-8, R-1-9, R-1-10, R-E, R-1-13, R-E-13, R-1-20, R-E-20, R-O, R-1-30, R-E-30, R-O-30, R-1-1Ac., R-E-1Ac., R-O-1Ac., R-1-2Ac., R-E-2Ac., and R-0-2Ac. Zones by adding suffix “Av.” to any of such zones.
   Lands classified in any of the “Av.” sub-zones may contain lots of a minimum lot area as prescribed in the following table, provided that the average lot area of all the lots so zoned shall not be less than the square footage required by that sub-zone and provided, further, that in computing such average, only those lots not exceeding one and one-half (1- 1/2) times the square feet of the sub-zone will be considered.  The following table shows the minimum and average lot areas allowed for each sub-zone classification:
 
Sub-Zone Classification
Minimum Lot Area Allowed Area
Average Lot Area
8000 Av.
7000 Square feet
8000 Square feet
9000 Av.
7000 Square feet
9000 Square feet
10000 Av.
7000 Square feet
10000 Square feet
13000 Av.
8000 Square feet
13000 Square feet
20000 Av.
13000 Square feet
20000 Square feet
30000 Av.
20000 Square feet
30000 Square feet
1 Ac. Av.
30000 Square feet
1 Ac.
2 Ac. Av.
1 Ac.
2 Ac.
 
   (b)   Sub-zones for the R-P-D Zone may be established. The requirements for the R-P-D Zone shall apply to the respective R-P-D sub-zones except that the suffix for the R-P-D designation shall be the maximum average number of dwelling units per acre, followed by the letter "U." Land proposed for development in the R-P-D Zone pursuant to an approved specific plan may be zoned with an overall density for the entire residential area of master plan without regard to ownership. Land so zoned shall be designated with the letters "SP" and shall be subject to the land use and development requirements specified in the underlying specific plan.
   The following are examples of sub-zones:
   (1)   The sub-zone of the R-E-20 Zone which requires a minimum average lot area of 20,000 square feet shall be R-E-20 Av.
   (2)   The Residential Planned Development Zone (R-P-D) which permits a maximum average of twenty (20) dwelling, units per acre shall be R-P-D-20U; a maximum average of six (6) dwelling units per acre shall be R-P-D-6U.
   (3)   The sub-zone of R-P-D-3U-SP would permit a total density of three (3) dwelling units per acre, multiplied by the total number of acres for the total area. Assuming one thousand (1,000) acres were subject to R-P-D-3U-SP, the total density available would be three thousand (3,000) dwelling units. Assuming eight hundred (800) acres were devoted to open space or park areas, the three thousand (3,000) dwelling units would be permitted to be applied over the remaining two hundred (200) acres.
(§ 8112, T.O.O.C., as amended by § 1, Ord. 89, § 1, Ord. 117, § 1, Ord. 135-NS, eff. January 27, 1970, and § 29, Ord. 1555-NS, eff. May 13, 2011)