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Merced County, CA Building Safety: Plumbing Permits (2026)

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

Key Facts

Adopted code
2022 California Plumbing Code
Local amendments
None to the state plumbing code
Permit
Same permit track as building/electrical work
Permit lifespan
Voids after 180 days without inspection
Misdemeanor penalty
Up to $1,000 fine, 6 months jail

Summary

Merced County enforces the 2022 California Plumbing Code for every plumbing installation, alteration, or repair in the unincorporated county, requiring the same Title 16 permit process before work starts.

These county ordinances apply to unincorporated areas of Merced County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Those certain documents, three certified copies of which one is on file in the office of the clerk, and two in the office of the deputy director - buildings, marked and designated as California Code of Regulations Title 24, Part 5, 2022 California Plumbing Code, based on the 2021 Uniform Mechanical Code as published by the International Association of Plumbing and Mechanical Code Officials and amended by the California Building Standards Commission is hereby adopted by reference and, except as herein otherwise provided, are applicable to and shall govern all construction within the unincorporated area of the county of Merced.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4930839; v8 updated 2026-06-02).

Full Breakdown

020 confirms the county adopted the state plumbing code with no local deletions, amendments, or superseding provisions. 070 still requires a separate permit for plumbing work from the building official, the deputy director of buildings in the Community and Economic Development Department, obtained through the same Chapter 1, Division II, Part 2 administration and enforcement provisions of the California Building Standards Code that govern building, electrical, and mechanical permits. 070(B) if work is not started, or lapses if suspended for 180 calendar days, with one 180-day extension available on written request showing good cause under subsection C.

130 get an alternate plumbing standard: bathroom facilities must meet Appendix C of the 2022 California Plumbing Code unless community dormitory-standard facilities are provided within 300 feet, and an individual kitchen, if provided, needs at least a seven-by-seven-foot space with a trapped and vented sink.

Violations & Fines

Installing or altering plumbing without the required permit is enforced under the same Title 16 misdemeanor and infraction penalties as any other unpermitted construction: § 16.12.030 sets a misdemeanor fine of up to $1,000 and up to six months in jail, or graduated infraction fines of $100, $200, and $500 for repeat violations of the same section within a year, with each day of the violation charged separately.

Frequently Asked Questions

What plumbing code applies in unincorporated Merced County?
The 2022 California Plumbing Code, amended by the California Building Standards Commission, governs every plumbing installation, alteration, or repair under § 16.24.010. The county adopted it as written, with no local amendments under § 16.24.020.
Is a plumbing permit separate from my building permit?
Yes. Section 16.12.070 requires its own permit for plumbing work even on a project that also needs structural, electrical, or mechanical permits, and each permit follows the same 180-day start and completion clock before it expires.
What plumbing rules apply to a hunting cabin or seasonal dwelling?
Section 16.12.130 lets seasonal dwelling units, capped at 600 square feet and 180 days of use per year, meet Appendix C of the 2022 California Plumbing Code instead of full residential plumbing, or rely on shared dormitory-standard facilities within 300 feet.

Sources & Official References

Other rules in Merced County

All Merced County rules

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