Retaining Walls: Fillmore vs Moorpark

Do I need a permit for a retaining wall in Fillmore?

Retaining walls over 4 feet in height require a building permit with structural engineering plans. Walls supporting a surcharge (driveway, slope, or structure above) may need permits at any height.

Does a retaining wall need drainage in Fillmore?

Yes. All retaining walls should include drainage provisions such as weep holes or French drains to prevent hydrostatic pressure buildup behind the wall, which can cause failure.

Are there special requirements for hillside retaining walls in Fillmore?

Yes. Retaining walls in hillside areas north of town may require geotechnical investigation. Walls in the floodplain may need additional engineering for flood forces. Consult Community Development.

Do I need a permit for a retaining wall in Moorpark?

Yes, if the wall exceeds 4 feet from footing base to top. Horse properties with paddock grading often require permitted retaining walls. Contact the building division at (805) 517-6200.

Are there special retaining wall rules for horse properties in Moorpark?

Horse properties frequently need retaining walls for paddock grading and riding arenas. These walls often exceed 4 feet and require permits, engineered plans, and proper drainage design. Walls near equestrian trails must maintain access.

What engineering is needed for a Moorpark retaining wall?

Permitted walls require plans stamped by a licensed California civil or structural engineer. Hillside properties may also need a geotechnical investigation. Drainage design is mandatory to prevent hydrostatic pressure buildup.