Retaining Walls: Fullerton vs Newport Beach

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

Retaining walls over 4 feet in height (from footing to top) require a building permit and engineered plans. Walls 4 feet or under may be exempt if they do not retain a surcharge.

Can I put a fence on top of a retaining wall in Fullerton?

Yes, but the combined height of the retaining wall and fence is measured from the lower finished grade and must comply with zoning district fence height limits.

Do hillside retaining walls have extra requirements?

Yes. Retaining walls in hillside areas of northern Fullerton may require geotechnical investigations and drainage plans in addition to standard building permits.

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.