| Front yard | Within the required yard the limit rises on a sloped line to the setback line: solid 3 to 6 ft, open 6 to 9 ft (open means at least 35% open to light, 75% in the Coastal Overlay Zone). Chain link: 3 ft at the line. Corner and driveway visibility areas: 3 ft (standard triangles 25 ft along each line at corners, 10 ft at driveways). No fence in the public right-of-way without a Public Right-of-Way Permit. §142.0310 §113.0273 |
| Side & rear yards | 9 ft in required side and rear yards, open above 6 ft; 10 ft outside required yards. §142.0310 |
| Measuring & finish | The rules cover every fence and retaining wall, permit or not. Height runs from the lowest adjoining grade; on a retaining wall, from the high side. 30% of a fence's length may run 6 in over, and a Neighborhood Development Permit can allow 20% more with findings. Metal fences in required front and street-side yards need a colored, non-galvanized finish; sharp-pointed metal fences are only for agricultural uses in agricultural zones, and the term is undefined, so confirm spear tops with Development Services. §§142.0305, 142.0310, 142.0350–142.0370 §113.0270 |
| Building permit | At 7 ft or taller. No exemption for pool-barrier fences, historical resources, or sites where environmentally sensitive lands require a development permit; a retaining wall carrying a fence counts as surcharged and needs a permit even at 3 ft or less. Table 142-03A §129.0203 Bulletin 220 |
| Pool barriers | The state Act plus an amendment effective April 22, 2026: exit alarms with an in-pool alarm don't count as two features. §145.3102 |
| Fire & Zone 0 | In force in Very High zones; Zone 0 is the 5 ft around the structure. New structures applying for a permit on or after February 28, 2026: all new fences and gates in Zone 0 noncombustible, such as steel, aluminum, fiber cement board or masonry, with a 5-ft noncombustible span where a fence attaches and a conditional exception for fire-retardant-treated wood. Existing homes: a 5-ft span where a fence or gate attaches perpendicular to the house, nothing new outside Zone 0, no action required yet, enforcement from February 28, 2027, and full compliance, including replacing noncompliant fences and gates, to be attempted by February 28, 2029. Fences in brush management Zone One: noncombustible, one-hour fire-rated or heavy timber. §512.0604 Standard D-2 Zone 0 guidelines §142.0412 |
| Coastal & design review | Coastal Overlay Zone: a Coastal Development Permit unless exempt; any fence or retaining wall between the shoreline and the first public roadway needs one (Process Three). La Jolla and Carmel Valley planned districts add review. §126.0702 Table 142-03A |