Costa Mesa's Zoning Code (Title 13) establishes building setback requirements that vary by zoning district. In the R1 single-family district, typical setbacks are 20 feet for the front yard, 3 feet for interior side yards (combined minimum of 25% of lot width), and 10 feet for rear yards. Corner lots require additional street-side setbacks. Setback standards are detailed in Table 13-32 of the Municipal Code.
Costa Mesa's residential building setbacks are established in Title 13 of the Municipal Code and vary by zoning district. The R1 Single-Family Residential district, which covers the majority of Costa Mesa's residential areas, requires a minimum front yard setback of 20 feet from the front property line. Interior side yard setbacks must be at least 3 feet, with the combined total of both side yards equaling a minimum of 25% of the lot width. Rear yard setbacks are 10 feet for the primary structure. Accessory structures that do not exceed 6.5 feet in height may have a zero rear yard setback in the R1 zone. Corner lots require a street-side yard setback of 10 feet. Garages have a minimum 5-foot setback, though additional setback may be required to ensure adequate vehicle backup distance from the street. The R2-HD (Medium Density Residential) and R3 (High Density Residential) districts have different setback standards appropriate for their density levels. All setback measurements are taken from the property line, not the curb or sidewalk edge. Eaves, cornices, and similar architectural projections may extend up to 2.5 feet into required setbacks. Covered porches and patios may encroach into rear yard setbacks subject to lot coverage limitations. The Costa Mesa Planning Division at (714) 754-5245 can provide setback determinations for specific parcels. Table 13-32 of the Municipal Code contains the complete setback standards for all residential zones.
Construction within required setback areas without a variance is a code violation. Stop-work orders will be issued for projects encroaching into setbacks. The property owner must either obtain a variance from the Planning Commission or modify the structure to comply. Variance applications require public notice to neighbors and a Planning Commission hearing. Structures built in violation of setbacks may be required to be removed or modified at the owner's expense. Administrative fines start at $100 per day for non-compliance.
Costa Mesa, CA
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