Sonoma, CA Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted code
- 2025 California Plumbing Code
- Sewer-distance rule
- Unavailable if over 300 ft. away
- Gas shutoff valve mandate
- New/altered nonresidential buildings
- Enforcing agency
- City of Sonoma building department
- Code currency
- Ord. 13-2025, Dec. 3, 2025
Summary
The City of Sonoma adopts the 2025 California Plumbing Code by reference under Sonoma Municipal Code § 14.10.005(E), with local amendments in § 14.10.030 addressing sewer connections and earthquake gas shutoff valves. A plumbing permit is required unless the work falls on the narrow exemption list in § 14.10.010.
E. 2025 California Plumbing Code published by the International Association of Plumbing and Mechanical Officials; ... Amend Section 713.4 to conform with Sonoma Valley County Sanitation District Code to read as follows:713.4 Public Sewer Availability. The public sewer may be considered to not be available for a proposed building or exterior drainage facility where such public sewer or a building or an exterior drainage facility connected thereto is located more than 300 feet from a proposed building or exterior drainage facility on a lot or premises that abuts and is served by such public sewer.
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
005(E) adopts the 2025 California Plumbing Code, published by the International Association of Plumbing and Mechanical Officials, current through Ordinance 13-2025 of December 3, 2025. 030 then adds several appendices, including rules for sizing the water supply system and installation standards, and amends two specific provisions. 4, amended to conform with the Sonoma Valley County Sanitation District Code, states that the public sewer may be considered unavailable for a proposed building or exterior drainage facility where that sewer, or a connected drainage facility, sits more than 300 feet from the proposed building on a lot that abuts and is served by the sewer, which affects whether a septic system permit rather than a sewer connection permit applies.
8 separately requires earthquake-actuated gas shutoff valves, certified to California Code of Regulations, Title 24, Part 12, Chapter 12-16-1, in all new nonresidential buildings and in existing nonresidential buildings undergoing gas-line alterations or square-footage additions. 010, which excuses only minor repairs like clearing stoppages or reinstalling a water closet without rearranging pipes or valves.
Violations & Fines
Performing plumbing work requiring a permit without one is a Chapter 14.10 SMC violation. Sonoma Municipal Code § 1.12.010(A)(4) sets 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, and § 109.4 adds an investigation fee for work already performed without a permit.
Frequently Asked Questions
What plumbing code does the City of Sonoma use?
When is a Sonoma property considered too far from the public sewer?
Does the City of Sonoma require earthquake gas shutoff valves?
Sources & Official References
Other rules in Sonoma
California rules heatmap·Compare Sonoma to another location·View the California building safety overview
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Plumbing Permits in Nearby Cities
How other cities in Sonoma County handle plumbing permits.