Fence Requirements: Castro Valley vs Fremont
How do fence requirements rules compare between Castro Valley, CA and Fremont, CA?
Castro Valley and Fremont have similar restriction levels.
Castro Valley, CA
Alameda County
Alameda County Zoning Ordinance generally limits residential front yard fences to 3-4 feet and side or rear yard fences to 6-7 feet, with clear-vision triangles required at driveways and intersections.
View full Castro Valley rules →Fremont, CA
Alameda County
Fremont fence rules combine FMC Chapter 18 zoning with Chapter 15 building code, plus Fire Code rules in the Very High Fire Hazard Severity Zone.
View full Fremont rules →Key Facts Comparison
| Fact | Castro Valley | Fremont |
|---|---|---|
| Front yard max | 3-4 feet | - |
| Side and rear max | 6-7 feet | - |
| Clear-vision triangle | 3 feet max | - |
| Over max | Variance required | - |
| Agricultural zones | Different standards | - |
| Zoning | - | FMC Chapter 18 |
| Building | - | FMC Chapter 15 |
| VHFHSZ | - | Non-combustible 5 ft |
| Corner Triangle | - | 3 ft within 15 ft |
| HOA | - | Often stricter |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
What is a clear-vision triangle?
It is a sight-distance area at corners and driveways, typically 25 by 25 feet, where fences and landscaping are limited to 3 feet to ensure driver visibility.
Can I get a taller front yard fence?
Possibly, via a variance or administrative approval if you can show special circumstances, but solid front fences above 4 feet are rarely approved.
Fremont FAQ
Are wood fences allowed in the foothills?
Yes, but in the Very High Fire Hazard Severity Zone, fencing within 5 feet of a structure must be non-combustible material.
Who do I call with a fence question?
Start with Fremont Planning at 510-494-4455 for zoning questions or Building at 510-494-4460 for permit questions.
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