Retaining Walls: Chino vs Rialto
How do retaining walls rules compare between Chino, CA and Rialto, CA?
Chino and Rialto 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 →Rialto, CA
San Bernardino County
Retaining walls in Rialto are governed by California Building Code §105.2 (adopted via Rialto Code Title 15) and zoning standards in §18.61.170. Any retaining wall over 4 feet measured from bottom of footing to top of wall, or any wall supporting a surcharge, requires a building permit.
View full Rialto rules →Key Facts Comparison
| Fact | Chino | Rialto |
|---|---|---|
| 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 (footing to top) or any wall with surcharge |
| Code Authority | - | CBC §105.2 (CCR Title 24) via Rialto Code Title 15 |
| Zoning | - | Rialto Code §18.61.170 height standards |
| Building & Safety | - | 150 S Palm Ave; 909-820-2505 |
| Boundary Walls | - | Cal. Civ. Code §841 cost-sharing applies |
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.
Rialto FAQ
Do I need a permit for a 3-foot retaining wall in Rialto?
Generally no, if it does not support a surcharge (vehicle load or sloped soil). California Building Code §105.2 exempts walls 4 feet or less without surcharge.
What if my retaining wall holds up a driveway?
Any retaining wall supporting a surcharge (including a driveway or parked vehicle load) requires a building permit per CBC §105.2, regardless of height. Contact Rialto Building & Safety at 909-820-2505.
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