Retaining Walls: Chino vs Hesperia
How do retaining walls rules compare between Chino, CA and Hesperia, CA?
Chino and Hesperia have similar restriction levels.
Chino, CA
San Bernardino County
Per CBC § 105.2 (as adopted in CMC Title 15), retaining walls 4 ft or less in height (measured from bottom of footing to top of wall) and not supporting a surcharge are exempt from building permit. Taller walls or surcharge-loaded walls require permits, plans stamped by a licensed engineer, and inspections.
View full Chino rules →Hesperia, CA
San Bernardino County
Retaining walls in Hesperia require a building permit when over 4 feet in height (measured from bottom of footing to top of wall) or when supporting a surcharge, per California Building Code §105.2 as adopted by Hesperia. Engineered design and plan review apply.
View full Hesperia rules →Key Facts Comparison
| Fact | Chino | Hesperia |
|---|---|---|
| Permit-exempt height | ≤ 4 ft (no surcharge) | - |
| Permit-required threshold | Over 4 ft OR any surcharge | - |
| Code section | CBC § 105.2 (via CMC Title 15) | - |
| Engineered plans | Required for permitted walls | - |
| Combined fence-on-wall | Total height counted for zoning | - |
| Building Division | 909-334-3251 | - |
| Permit Threshold | - | Over 4 ft or any surcharge |
| Code Basis | - | CBC §105.2 / Hesperia Title 15 |
| Engineering | - | Stamped plans required >4 ft |
| Seismic Zone | - | Near San Andreas Fault |
Highlighted rows indicate differences between cities.
Chino FAQ
Do I need a permit for a 3-foot landscape wall in Chino?
No, retaining walls 4 ft or less from footing bottom to top, with no surcharge load, are exempt under CBC § 105.2 as adopted in CMC Title 15.
When does my retaining wall require an engineer?
Any wall over 4 ft, or any wall supporting a surcharge (sloped fill, structure, driveway), needs engineered plans from a California-licensed civil or structural engineer.
Can I stack a 6-ft fence on a 4-ft retaining wall?
The wall may be permit-exempt, but the combined 10-ft height triggers fence permitting and zoning review. Contact Chino Building & Safety at 909-334-3251 first.
Hesperia FAQ
Do I need a permit for a retaining wall in Hesperia?
Walls 4 feet or less without a surcharge are exempt under CBC §105.2. Anything taller, or supporting backfill/structures, requires a permit and engineered plans.
Does a retaining wall count toward fence height in Hesperia?
Yes. A fence on top of a retaining wall is measured from the high side, and the combined height must comply with Development Code §16.20.072.
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