Garden Grove, CA Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted code
- California Plumbing Code, 2025 Edition
- Min. supply pipe, single-family
- 1 inch diameter minimum
- Min. supply pipe, other buildings
- 3/4 inch diameter minimum
- Local amendment source
- Ord. 2940 § 7, 2022
- Penalty
- Up to $1,000 fine / 6 months jail
Summary
Garden Grove adopts the 2025 California Plumbing Code under §18.04.010 and tightens it locally in Chapter 18.14, setting a one-inch minimum building supply pipe for single-family homes and three-quarter-inch for other buildings. Plumbing work needs a Building Services Division permit before installation.
The last paragraph of Section 610.8 is hereby amended to read as follows: No building supply pipe shall be less than one inch in diameter for single family dwellings and 3/4 inch in diameter for all other buildings.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4903654; v10 updated 2026-05-12).
Full Breakdown
010(A)(5) of the Garden Grove Municipal Code adopts "the California Plumbing Code, 2025 Edition, as published by the International Association of Plumbing and Mechanical Officials, including Appendices A, B, C, D, G, H, and I," as part of Title 18's integrated building-code package. 4, the fixture-unit table used to size water pipes and meters. Both amendments were adopted by Ordinance No. 2940 in 2022 and carried forward into the 2025 code cycle. Any new plumbing installation, water-service connection, fixture addition, or repiping covered by these sections needs a permit from the Building Services Division, and the supply-pipe minimums apply regardless of what a smaller diameter might otherwise be sized under the unamended state fixture-unit tables.
010(B), so plumbing permit review follows the same Building Official process, inspection sequence, and appeal path through the Administrative Board of Appeals as building and electrical permits.
Violations & Fines
Installing or altering plumbing without the required permit, or undersizing a building supply line below the one-inch (single-family) or three-quarter-inch (other buildings) minimum in §18.14.010, is a Garden Grove Municipal Code violation. Under the citywide general penalty at §1.04.010, it's a misdemeanor punishable by up to $1,000, up to six months in jail, or both, with each day of the violation a separate offense.
Frequently Asked Questions
Does Garden Grove change the state Plumbing Code's pipe sizes?
What plumbing code edition applies in Garden Grove right now?
Do I need a permit to replace a water supply line at my house?
Sources & Official References
Other rules in Garden Grove
California rules heatmap·Compare Garden Grove to another location·View the California building safety overview
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