Fence Requirements: Ontario vs San Bernardino
How do fence requirements rules compare between Ontario, CA and San Bernardino, CA?
Ontario and San Bernardino have similar restriction levels.
Ontario, CA
San Bernardino County
Ontario fence requirements include zoning-based heights, setbacks, sight triangles, buffer walls on industrial edges, and CBC structural standards. Pool, retaining, and masonry walls have additional requirements.
View full Ontario rules →San Bernardino, CA
San Bernardino County
San Bernardino fences must meet Development Code 19.20.030 for height, setback, and sight visibility, and use materials approved under the building code. Barbed and razor wire are limited to industrial zones.
View full San Bernardino rules →Key Facts Comparison
| Fact | Ontario | San Bernardino |
|---|---|---|
| Zoning | Setbacks and sight triangles | - |
| Easements | Cannot encroach without consent | - |
| Barbed Wire | Industrial and agricultural only | - |
| Buffer Walls | Required industrial to residential | - |
| HOA | Adds design controls | - |
| Sight Triangle | - | 3 feet max in corner visibility area |
| Graffiti | - | Must be removed per SBMC 8.27 |
| Razor Wire | - | Industrial only |
| Maintenance | - | Structurally sound required |
Highlighted rows indicate differences between cities.
Ontario FAQ
Can I put barbed wire on my Ontario fence?
Generally not in residential zones. Barbed and razor wire is limited to industrial and agricultural zones, often with approvals.
Do easements affect fence placement?
Yes. Fences cannot block utility or drainage easements. Utilities can remove unauthorized fencing in an easement without paying to replace it.
San Bernardino FAQ
Can I put barbed wire on top of my fence?
Not in residential zones. Barbed wire and razor wire are generally limited to industrial zones, usually requiring conditional use approval.
What is a sight-visibility triangle?
A corner or driveway area where fences and landscaping must stay under three feet high so drivers can see oncoming traffic and pedestrians.
Compare other topics
See how Ontario and San Bernardino compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool