Retaining Walls: Camarillo vs Simi Valley
How do retaining walls rules compare between Camarillo, CA and Simi Valley, CA?
Camarillo and Simi Valley have similar restriction levels.
Camarillo, CA
Ventura County
Retaining walls over 4 feet in height require a building permit and engineered plans under CMC Title 16 and the California Building Code. Combined retaining wall and fence heights are measured from the lower finished grade. Retaining walls are common in Camarillo's hillside neighborhoods.
View full Camarillo rules →Simi Valley, CA
Ventura County
Simi Valley requires building permits for retaining walls over 4 feet in height and engineering for walls supporting surcharges. Retaining walls are common in the city's hillside areas and must meet structural and drainage standards.
View full Simi Valley rules →Key Facts Comparison
| Fact | Camarillo | Simi Valley |
|---|---|---|
| Permit Trigger | Walls over 4 feet high | Over 4 feet from footing to top |
| Engineering Required | Licensed engineer plans for >4 ft | Licensed engineer plans |
| Height Measurement | From bottom of footing to top | - |
| Drainage | Weep holes or drainage required | Weep holes or drain pipe required |
| Grading Permit | May be needed for earthwork | - |
| Hillside Areas | - | Additional geotechnical review |
Highlighted rows indicate differences between cities.
Camarillo FAQ
Do I need a permit for a retaining wall in Camarillo?
Yes, if the wall exceeds 4 feet from the bottom of the footing to the top. Walls over 4 feet also need engineered plans from a licensed engineer. Walls under 4 feet are generally permit-exempt but must comply with zoning setback requirements.
Can I put a fence on top of my retaining wall?
Yes, but the combined height is measured from the lower finished grade. A 4-foot retaining wall with a 6-foot fence creates a 10-foot total height, which may exceed zoning limits. Check with Community Development at (805) 388-5360 for your specific situation.
Who maintains retaining walls in Camarillo HOA communities?
It depends on the CC&Rs. Retaining walls that are part of the original tract development may be HOA common area responsibility. Walls built by individual owners on their lots are typically the owner's responsibility. Review your CC&Rs or contact your HOA.
Simi Valley FAQ
Do I need a permit for a retaining wall in Simi Valley?
Yes, if the wall exceeds 4 feet from the bottom of the footing to the top. Walls supporting surcharges (slopes, driveways) need permits regardless of height.
Do retaining walls need to be engineered?
Walls requiring permits must have plans prepared by a licensed civil or structural engineer. Hillside properties may also need geotechnical review.
Can I build tiered retaining walls to avoid permit requirements?
Multiple tiered walls within close proximity may be measured as one wall for height purposes. The Building Division determines whether a permit is required based on the total effective height.
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