Building Permits in Costa Mesa, CA
Check permit requirements for home improvement projects in Costa Mesa. Select a project type below to see local requirements, estimated fees, and how to apply.
Key Exemptions in Costa Mesa
These projects typically don't require a building permit in Costa Mesa:
Cosmetic bathroom updates without electrical or plumbing changes do not require a permit.
Freestanding decks not more than 30 inches above grade are exempt from a building permit.
Replacing an existing driveway in the same footprint with no changes to the curb cut is generally exempt from permit requirements.
Replacing a light fixture or outlet does not require a permit.
Backyard fences 6 feet or under do not require a building permit.
See all rules by selecting a project type below, or use our free lookup tool for a personalized answer.
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Check Your Project →Costa Mesa Building Department
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Permit Guides
Read our in-depth guides for common home improvement projects: