Retaining Walls: Hesperia vs San Bernardino
How do retaining walls rules compare between Hesperia, CA and San Bernardino, CA?
Hesperia and San Bernardino have similar restriction levels.
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 →San Bernardino, CA
San Bernardino County
Retaining walls over four feet from the bottom of the footing, or any wall supporting a surcharge, require a building permit and engineered plans under the California Building Code.
View full San Bernardino rules →Key Facts Comparison
| Fact | Hesperia | San Bernardino |
|---|---|---|
| Permit Threshold | Over 4 ft or any surcharge | Over 4 feet or with surcharge |
| Code Basis | CBC §105.2 / Hesperia Title 15 | - |
| Engineering | Stamped plans required >4 ft | - |
| Seismic Zone | Near San Andreas Fault | - |
| Engineer | - | Licensed CA engineer stamp |
| Seismic Concern | - | Near San Andreas and San Jacinto faults |
| Building and Safety | - | 909-384-5065 |
Highlighted rows indicate differences between cities.
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.
San Bernardino FAQ
Do I need an engineer for a three-foot wall?
Generally no if it is less than four feet from the footing and carries no surcharge; taller or loaded walls require engineered plans.
What is a surcharge?
Any load above the wall such as a sloped yard, driveway, or structure that adds pressure; walls with a surcharge need a permit regardless of height.
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