Costa Mesa, CA Fence Regulations: Height Limits (2026)

Section 13-75 of the Costa Mesa Municipal Code sets the city's fence and wall height standards for every zoning district. On corner lots, any wall or fence taller than three and a half feet must sit back at least five feet from the street side property line, a rule the development services department applies to keep sightlines open at intersections. Inside a required visibility triangle, the maximum height drops further: fences, walls and landscaping there are capped at two and a half feet, and decorative details are barred from the triangle entirely.

Elsewhere, the code allows decorative items, lights and caps to project up to 12 inches above whatever height limit applies, but limits them to one item for every six lineal feet of fence or wall so a run of ornamental posts cannot function as extra fence height. In commercial zones, interior property lines abutting residentially zoned land require a solid masonry wall at least six feet and no more than eight feet high, and industrial zones carry the same six-to-eight-foot masonry wall requirement along any boundary with a residential or commercial zone; either ceiling can be raised only if an environmental study documents the need.

All of these heights are measured the same way: from the highest finished grade at the base of the wall or fence, not the lower side, which matters on sloped lots. Interior residential fencing outside a corner lot or visibility triangle is governed by the height diagram in Figure 13-75(a), referenced directly in the ordinance. Fences built adjacent to a public street also need planning division sign-off for compatibility with the surrounding streetscape.