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Napa County, CA Swimming Pools & Spas: Pool Permits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified June 2026

Swimming pool permit rules in Napa County, CA, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.

Key Facts

Permit required
Yes - all residential pools and spas
Where to apply
Online Permit Center (Accela)
Submittal
Residential Pool & Spa checklist + Pool Safety Notice
Phone
Building Division (707) 253-4417
State trigger
HSC § 115922 requires permit and inspection

Summary

Napa County Building Division requires a building permit for every residential pool or spa. Applications go through the Online Permit Center with a Residential Pool & Spa submittal checklist and a Pool Safety Notice acknowledgement.

City-specific rules exist: Napa has its own pool permits rules that differ from Napa County's county-level regulations. If you live in Napa, check the city-specific page instead.

Any person entering into an agreement to build a swimming pool or spa, or to engage in permitted work on a pool or spa covered by this article, shall give the consumer notice of the requirements of this article. Effective January 1, 2007, the State Department of Health Services shall have on its Internet Web site approved pool safety information available for consumers to download. Pool contractors are encouraged to share this information with consumers.

Full Breakdown

Napa County's Building Division regulates pool and spa construction in the unincorporated county through the same permit process that applies to other building work. Applicants submit through the Online Permit Center (https://aca-prod.accela.com/NAPACO/Default.aspx) and follow the published 'Submittal Checklist: Pools and Spas - Residential.' Additional Building Division materials include a 'Pools Safety Notice' (the consumer notice required by HSC section 115924) and a 'Swimming Pool Setbacks' handout. State law (HSC 115922) requires that a building permit be issued before pool construction or remodel begins, and that the local building official inspect drowning-prevention features before signing off. Pool plans must also comply with the California Building/Residential Code (Title 24) and California Plumbing/Electrical Code requirements for pool wiring, bonding, and circulation.

Violations & Fines

Constructing a pool or spa without a permit is a code violation. Work performed without inspection cannot pass final, and unpermitted pools must typically be exposed for inspection or removed; investigation fees may double normal permit fees.

Frequently Asked Questions

Do I need a permit for a small above-ground pool?
If the pool can hold water deeper than 18 inches it meets the state's definition of a swimming pool, and the Building Division's pool/spa permit requirements apply. Call the Building Division at (707) 253-4417 to confirm.
What if I already built a pool without a permit?
Contact the Building Division and apply for a retroactive permit. Expect inspection of all systems (electrical bonding, plumbing, barriers) and possible investigation fees in addition to standard permit fees.
Does the contractor have to tell me about the safety rules?
Yes. HSC 115924 requires the pool contractor to give the consumer written notice of the Pool Safety Act requirements - that is the 'Pool Safety Notice' you sign with your permit application.

Sources & Official References

Other rules in Napa County

All Napa County rules

California rules heatmap·Compare Napa County to another location·View the California swimming pools & spas overview

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