Walls, fences, or hedges may be maintained in the following locations:
A. 
General. A wall, fence, or hedge no more than 36 inches in height may be located and maintained on any part of a lot in any Mixed Use zone except within a required front yard setback of a commercial or mixed use development and within the required pedestrian-oriented plaza area in the GGMU and NMU zones. However, in the CC and AR zones, a residential component of a mixed use development may include a wall, fence, or hedge within the front yard setback if approved by the hearing body.
B. 
Interior Lots. On interior lots, a fence, wall, or hedge not exceeding eight feet in height above the adjacent natural grade may be located anywhere on the lot behind the required front yard setback line.
C. 
Corner and Reverse Corner Lots. On corner and reverse corner lots, a fence, wall, or hedge not exceeding eight feet in height above the adjacent natural grade may be located anywhere on the lot behind the required front yard setback line and behind the required corner side yard setback line.
D. 
Retaining Wall Below Natural Grade. Where a retaining wall protects a cut below the natural grade and is located on the line separating lots or parcels, the retaining wall may be topped by a wall, fence, or hedge of the same height that would otherwise be permitted at the location if no retaining wall existed.
E. 
Retaining Wall Containing Fill. Where a retaining wall contains a fill, the height of the retaining wall built to retain the fill shall be considered as contributing to the permissible height of a wall, fence, or hedge, provided that in any event, a protective fence or wall not more than 36 inches in height may be erected at the top of the retaining wall. Any portion of a fence above the maximum height shall be an openwork fence. An openwork fence means a fence in which the component solid portions are evenly distributed and constitute not more than 60% of total surface area of the face of the fence.
F. 
Open Space. No wall, fence, or hedge exceeding 42 inches in height may be located in open space required between buildings used for human habitation when the buildings are situated front to front, front to rear, or front to end.
G. 
Freeway Right-of-Way Adjacent. A wall or fence not exceeding eight feet in height may be constructed along that portion of a lot or parcel that abuts a freeway right-of-way, provided that said wall or fence does not extend into any front yard.
H. 
Residential Zone Adjacent. Any other provision of this Chapter notwithstanding, a wall, fence, or hedge that is provided along a common boundary line separating property used for commercial or industrial purposes from an "R" zoned property or any PUD established exclusively for residential use, and that is permitted or required to maintain a height of six feet, may be extended to a height not to exceed eight feet. However, no wall, fence, or hedge shall extend more than six feet above the highest existing grade elevation on a subject lot.
I. 
Railroad or Flood Control Channel Adjacent. When commercial or industrial property has a common property line with an "R" zoned property or any PUD established exclusively for residential use, and that is a right-of-way for a railroad or flood control channel, the hearing body may waive the requirement for a zone separation wall or fence.
J. 
Setback Area. Notwithstanding the above requirements, no fence, wall, or hedge shall be permitted within any required street-fronting setback area for any commercial or residential/commercial mixed use development, with the exception of any fence or wall required for any outdoor dining area.
K. 
Any walls or fences facing a street or alley shall include clinging vines, low shrubs, or other landscaping treatment to deter graffiti.
(2814, 2012; 2939 § 3, 2022; 2967, 8/12/2025)