Retaining Walls: Ontario vs Victorville
How do retaining walls rules compare between Ontario, CA and Victorville, CA?
Victorville has fewer restrictions than Ontario.
Ontario, CA
San Bernardino County
Ontario requires a permit for any retaining wall over 4 feet (footing to top) or carrying a surcharge such as a slope or driveway. Engineered plans by a licensed California civil or structural engineer are required.
View full Ontario rules →Victorville, CA
San Bernardino County
Retaining walls over 4 feet measured from the bottom of the footing require a building permit with engineered plans in Victorville. Lower walls need no permit but must meet setback and drainage rules.
View full Victorville rules →Key Facts Comparison
| Fact | Ontario | Victorville |
|---|---|---|
| No Permit | Up to 4 feet unsurcharged | - |
| Permit Required | Over 4 feet or surcharged | - |
| Plans | Licensed engineer required | - |
| Drainage | Cannot flow to neighbor | Weep holes and backfill |
| Measurement | Bottom of footing to top | - |
| Permit Threshold | - | Over 4 ft or surcharge |
| Measure | - | Bottom of footing to top |
| Engineer | - | CA licensed plans required |
| Combined Height | - | Wall plus fence counts |
Highlighted rows indicate differences between cities.
Ontario FAQ
Does a 3-foot retaining wall in Ontario need a permit?
Usually no if it is unsurcharged. If a slope, driveway, or pool loads the top of the wall, it is surcharged and does need a permit.
Who is liable if the wall fails?
The property owner. Using an engineer and permit creates a defensible record. Unpermitted walls expose you to liability for damage downhill and next door.
Victorville FAQ
Do I need a permit for a 3-foot retaining wall?
Not if it is under 4 feet and has no surcharge. Anything over 4 feet or supporting a driveway or slope requires engineered permit plans.
Does a fence on a wall count toward height?
Yes. The combined height of the retaining wall plus the fence on top is used to determine Development Code fence-height compliance.
Compare other topics
See how Ontario and Victorville compare on other ordinance categories.
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