Retaining Walls: Costa Mesa vs Newport Beach

Do I need a permit for a retaining wall in Costa Mesa?

Yes, if the wall exceeds 4 feet from the bottom of the footing to the top. Walls of any height with surcharge loads also require permits.

Do I need an engineer for my retaining wall?

Yes, retaining walls over 4 feet or supporting surcharge loads require engineered plans prepared by a licensed civil or structural engineer.

What inspections are required for retaining walls?

Costa Mesa requires inspections at the footing stage, reinforcement placement, and final completion before backfilling.

Do I need a permit for a retaining wall in Newport Beach?

Retaining walls over 4 feet in height (measured from bottom of footing to top of wall) require a building permit and engineered plans. Walls under 4 feet may still need a permit if they support a surcharge or are combined with fencing.

Can I build a fence on top of a retaining wall in Newport Beach?

Yes, but the combined height of the retaining wall and fence is regulated. The total height may trigger permit requirements and must comply with the zoning code fence height limits for the applicable yard area.

Do retaining walls in the Coastal Zone need special permits in Newport Beach?

Yes. Retaining walls in the Coastal Zone, especially those visible from public areas or involving grade changes near the coast, may require a Coastal Development Permit in addition to a building permit.