Retaining Walls: Midway City vs Newport Beach

Do I need a permit for a retaining wall in unincorporated Orange County?

Yes, if the wall retains level earth over 4 feet, retains any slope, or is subject to surcharge loads. Engineering by a licensed professional is required and plans must be signed.

Can I build a short retaining wall without a permit?

Retaining walls under 4 feet retaining level earth without surcharge are generally exempt from permits. However, they must still comply with property setback requirements and proper drainage.

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.