A. 
In order to classify, regulate, restrict and segregate the uses of land and buildings, to regulate and restrict the height and bulk of buildings, to regulate the area of yards and other open spaces about buildings, and to regulate the density of population, twenty-two classes of zoning districts are established by this title to be known as follows:
RE
Residential Estate
R1
Single-Family Residential
R2
Multiple-Family Residential
RM
Multiple-Family Residential
R3
Multiple-Family Residential
R4
Multiple-Family Residential
RR
Resort Residential
DRN
Downtown Residential Neighborhood
PPO
Planned Professional Office
PLC
Planned Limited Commercial
PCC
Planned Community Commercial
MXC
Mixed Use Commercial
CTR
Commercial Tourist and Recreation
CBP-2
Commercial Business Park
NBP
Neighborhood Business Park (Transition)
I-1
Light Industrial
OS
Open Space
OS-R
Open Space Residential
S
Specific Plan Overlay
H
Hillside Review Overlay
LH
Limited Height Overlay
P/IH
Public/Institutional Housing Overlay
B. 
The permitted uses in each district are exclusive to that district unless explicitly allowed in another zoning district or as may be determined by the planning commission pursuant to authority granted by this title. If the use is not specifically listed as a permitted or conditional use, the use is prohibited.
(Ord. 80 Art. IV, 1984; Ord. 263 § 4, 1989; Ord. 862 § 2, 2022)