San Clemente, CA Building Safety: Building Permits (2026)
Key Facts
- Default rule
- Permit required unless work is on exemption list
- Accessory structure exemption
- Under 120 sq ft, 8-ft wall height max
- Retaining wall exemption
- Up to 4 feet, no surcharge or steep slope
- Deck exemption
- Under 200 sq ft, 30 inches above grade
- Governing section
- CBC § 105.2, San Clemente Municipal Code § 15.08.020
Summary
San Clemente requires a building permit for construction and alteration work unless a project falls within the specific exemption list in amended CBC Section 105.2 (Municipal Code Section 15.08.020), covering minor accessory structures, low fences, short retaining walls, small decks and similar limited work.
E.Subsection 105.2 is hereby amended by deleting items 1 through 13 under the heading "Building" and replacing them with the following: Building: 1.One-story detached accessory buildings and structures used as tool and storage sheds, playhouses and similar uses and structures such as portable shade cloth structures, provided the floor area does not exceed 120 square feet or a wall height of 8 feet. Such structures must comply with the setback and height requirements of the City Zoning Ordinance and the Fire Code.2.Fences other than swimming pool barriers, not over 6 feet high. Masonry fences under 42 inches in height above finish grade. ... 4.Retaining walls that are not over 4 feet in height measured from the bottom of footing to the top of wall unless supporting a surcharge, impounding Class I, II or IIIA liquids, or if on a slope less than 1 in 3. ... Unless otherwise exempted, separate plumbing, electrical and mechanical permits will be required for the above-exempted items.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Traffic: Supplement 30 | Code of Ordinances: Supplement 66 Update 1).
Full Breakdown
The City adopted the 2025 California Building Code by Ordinance No. 1796 on November 4, 2025, and rewrote Section 105.2's list of work exempt from a building permit. Anything not on that list, and not otherwise excepted elsewhere in the Building Code, needs a permit before work starts. The rewritten list exempts one-story detached accessory structures like tool sheds and playhouses under 120 square feet with walls no taller than 8 feet, provided they still meet the Zoning Ordinance's setback and height rules and the Fire Code; fences other than pool barriers up to 6 feet, and masonry fences under 42 inches; retaining walls up to 4 feet measured from the footing to the top, unless they support a surcharge, hold back Class I, II or IIIA liquids, or sit on a slope steeper than 1-in-3, in which case they need engineering and planning review to determine if a permit is required; water tanks on grade under 5,000 gallons with a height-to-diameter ratio no greater than 2:1; and detached decks, walkways and driveways under 200 square feet that sit no more than 30 inches above grade and are not part of a required exit path or accessible route.
Other listed exemptions cover cosmetic finish work like painting and cabinetry that does not touch electrical, mechanical or plumbing systems; playground equipment at one- and two-family homes; window awnings projecting no more than 54 inches; movable fixtures and partitions under 5 feet 9 inches; and ground-mounted antennas and flagpoles up to 20 feet. Even where the structure itself is exempt, the code requires the applicant to separately obtain any needed plumbing, electrical or mechanical permit for work touching those systems.
Violations & Fines
Building without a required permit exposes the property to the City's general code-enforcement process: a correction notice under Section 15.04.050, a 30-day grace period to legalize or remove the work, and a reinspection fee if it is not fixed in time, on top of any penalty the Building Official assesses under the adopted Building Code and Chapter 1.20 of the Municipal Code.
Frequently Asked Questions
Do I need a permit to build a shed in my San Clemente backyard?
Can I build a retaining wall without a permit?
Does my backyard deck need a building permit?
Sources & Official References
Other rules in San Clemente
California rules heatmap·Compare San Clemente to another location·View the California building safety overview
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