Fence Requirements: Costa Mesa vs Irvine
How do fence requirements rules compare between Costa Mesa, CA and Irvine, CA?
Costa Mesa and Irvine have similar restriction levels.
Costa Mesa, CA
Orange County
Costa Mesa regulates fence placement, setbacks, and maintenance under CMMC zoning provisions. Fences in the front yard setback area are limited to 42 inches in height, while side and rear yard fences may be up to 6 feet. Corner lot visibility triangles must remain clear.
View full Costa Mesa rules →Irvine, CA
Orange County
Unincorporated Orange County regulates fences under Title 7, Division 5 (Zoning) of the Codified Ordinances. Front yard fences are limited to 42 inches, side and rear yard fences to 6 feet. Fences must not obstruct sight lines at intersections or driveways.
View full Irvine rules →Key Facts Comparison
| Fact | Costa Mesa | Irvine |
|---|---|---|
| Front Yard Max | 42 inches (3.5 feet) | - |
| Side/Rear Max | 6 feet | - |
| Corner Visibility | Triangle must remain clear | - |
| Barbed Wire | Prohibited in residential zones | - |
| Zoning Questions | Development Services (714) 754-5245 | - |
| Front Yard | - | 42 inches maximum |
| Side/Rear | - | 6 feet maximum |
| Sight Lines | - | 25-ft triangle at intersections |
| Permit | - | Not required under 6 ft typically |
| OC Planning | - | (714) 667-8888 |
Highlighted rows indicate differences between cities.
Costa Mesa FAQ
How tall can my front yard fence be in Costa Mesa?
Front yard fences within the required setback area are limited to 42 inches (3.5 feet). Side and rear yard fences may be up to 6 feet.
Do I need a permit for a fence in Costa Mesa?
Wood and vinyl fences under 6 feet generally do not require a building permit, but masonry or block fences may require one. Check with Development Services at (714) 754-5245.
Can I put a tall fence on a corner lot in Costa Mesa?
Corner lots must maintain clear visibility triangles at intersections. Fences and landscaping within the visibility area typically cannot exceed 30 inches in height.
Irvine FAQ
How tall can my fence be in unincorporated Orange County?
Front yard fences up to 42 inches, side and rear yard fences up to 6 feet under Title 7, Division 5. Corner lots have sight-line restrictions.
Do I need a permit for a fence?
Standard fences under 6 feet generally do not require a building permit unless they include retaining wall components. Check with OC Planning at (714) 667-8888.
What about fences on hillside lots?
Canyon and hillside properties may have different effective height measurements. Consult OC Planning for slope-adjusted fence height determinations.
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