Sonoma, CA Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in Sonoma, CA, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Permit-exempt pools
- Under 18 in. deep, 5,000 gal., above-ground
- Safety code adopted
- Appendix AX Swimming Pool Safety Act
- State statute referenced
- Health & Safety Code §§ 115920-115929
- First-offense fine
- Up to $100
- Appeal deadline
- 15 calendar days
Summary
The City of Sonoma requires a building permit for in-ground pools and most above-ground pools. Only small prefabricated pools under 18 inches deep and 5,000 gallons are exempt under Sonoma Municipal Code § 14.10.010, and permitted pools must comply with the Swimming Pool Safety Act appendix adopted at § 14.10.020(A)(4).
8. Prefabricated swimming pools accessory to a detached one-or two-family dwelling that are less than 18 inches deep, do not exceed 5,000 gallons, and are installed entirely above ground. ... ... 4. Adopt by reference and add Appendix Chapter AX (Swimming Pool Safety Act – Required by California Health and Safety Code Sections 115920 through 115929).
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 13-2025, passed December 3, 2025).
Full Breakdown
2 of the Building Code to list what work does not need a permit. Item 8 of that exemption list covers only prefabricated swimming pools accessory to a detached one- or two-family dwelling that are less than 18 inches deep, do not exceed 5,000 gallons, and are installed entirely above ground. Any pool deeper than 18 inches, larger than 5,000 gallons, in-ground, or built for a multifamily or commercial property falls outside that narrow exemption and needs a building permit from the city before construction.
020(A)(4) adds Appendix Chapter AX of the 2025 California Residential Code, the Swimming Pool Safety Act, required by California Health and Safety Code Sections 115920 through 115929, which sets the drowning-prevention features, such as barriers, alarms, or covers, a new residential pool must include. 10, with the same appeal rights to the board of appeals within 15 calendar days that apply to any building permit decision. Because the code is current only through Ordinance 13-2025 of December 3, 2025, homeowners should confirm current fee schedules with the building department before applying.
Violations & Fines
Building or maintaining a pool that required a permit but was never permitted is a violation of Chapter 14.10 SMC, punishable under § 1.12.010(A)(4) by a fine of up to $100 for a first violation, $500 for a second violation of the same section within a year, and $1,000 for a third or subsequent violation, plus an investigation fee under § 109.4 for work done without a permit.
Frequently Asked Questions
Do I need a permit for an above-ground pool in the City of Sonoma?
What safety features does a Sonoma pool permit require?
What happens if a pool is built in Sonoma without a permit?
Sources & Official References
Other rules in Sonoma
California rules heatmap·Compare Sonoma to another location·View the California swimming pools & spas overview
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Pool Permits in Nearby Cities
How other cities in Sonoma County handle pool permits.