Fairfield, CA Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted code
- 2025 CPC / 2024 UPC (Ord. No. 2025-10)
- Under-slab piping
- Requires alternate-methods approval
- Sewer lateral cleanout
- Required at property line, in yard box
- Permit bundling
- Combined with building permit (residential)
- Misdemeanor penalty
- Up to $2,000 fine or 6 months jail
Summary
Fairfield enforces the 2025 California Plumbing Code, based on the 2024 Uniform Plumbing Code, under Municipal Code § 5.2.9. Local amendments in § 5.2.10 require an alternate-methods approval before any water piping goes under a concrete slab, and add a mandatory cleanout at the property line for every new or replacement sewer lateral.
Adopt the California Plumbing Code (CPC) and appendices, 2025 edition, chapter 1, division II and the appendices thereto, based on the 2024 Uniform Plumbing Code as published by the International Association of Plumbing and Mechanical Officials... In addition to the cleanouts required in this code, a cleanout shall be required for all new or replacement sewer lines at or near the property line at the junction with the building sewer and the sewer main lateral. This cleanout shall be installed per City standard specifications and must be brought to grade and installed in a yard box.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4962673; v0 updated 2026-02-17).
Full Breakdown
9 adopts the CPC, 2025 edition, including its appendices, as enforced by the City's building division under state delegation in Title 24, Part 5. 3 so that no water piping may be installed in or under a concrete slab floor, or in or on the ground under a building, without first submitting and obtaining approval through an alternate methods and materials request that specifically addresses corrosion and pipe fracture from settlement risk. 1 that every new or replacement sewer line have a cleanout at or near the property line, at the junction between the building sewer and the sewer main lateral, installed to City standard specifications and brought to grade in a yard box; other exterior cleanouts must likewise be accessible through yard boxes or brought flush with grade using approved materials and adequately protected.
3(C), while commercial and industrial projects may pull a separate plumbing permit. Plumbing permits carry the standard one-year expiration, with up to two one-year extensions and a 90-day administrative extension available under the same conditions as other building permits.
Violations & Fines
Plumbing code violations are charged under the general Building and Housing Code penalty in § 5.1.4.8: a misdemeanor with a fine up to $2,000, up to six months in jail, or both, or an infraction with a fine up to $500 per day for a first offense. Starting plumbing work without a required permit also draws an investigation fee based on the building division's hourly rate before any permit will issue.
Frequently Asked Questions
Can I run water pipe under a concrete slab in Fairfield?
Does Fairfield require a cleanout for a new sewer line?
What plumbing code does Fairfield use?
Sources & Official References
Other rules in Fairfield
California rules heatmap·Compare Fairfield to another location·View the California building safety overview
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How other cities in Solano County handle plumbing permits.