Bonneville County, ID Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted plumbing code
- 2017 Idaho State Plumbing Code
- Adoption section
- §150.01(A)(10), amended 1-8-2026
- Ag exemption
- Exempt if it meets IBC §202 definition
- Permit authority
- County Zoning Administrator, §156.088
- Unpermitted-work fine
- $100 infraction under §156.999
- Permit threshold
- Required for structures valued $100+
Summary
Bonneville County enforces the 2017 Idaho State Plumbing Code as its official plumbing standard under § 150.01(A)(10). Plumbing work tied to construction of a building or structure worth $100 or more in the unincorporated county needs a written permit from the Zoning Administrator.
(A) The approved editions of the following nationally recognized codes, as adopted by the state or the State Building Code Board, are adopted as the Official Building Codes of the county: ... (10) 2017 Edition Idaho State Plumbing Code.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-1: Ordinance 280-26, passed 1-20-2026).
Full Breakdown
01 packages the county's construction codes, and item (10) names the 2017 Edition Idaho State Plumbing Code as the plumbing standard for the unincorporated county, alongside the 2018 International Residential and Building Codes and the 2023 National Electric Code. Subsection (B) pulls in all amendments made by the state or the State Building Code Board and the State Fire Marshal's office, so the plumbing code tracks whatever the state board has since revised. Subsection (C) exempts agricultural buildings from these adopted codes, provided the structure meets the IBC § 202 definition of an agricultural building on land the County Assessor has classified as actively devoted to agriculture under Idaho Code § 63-604; those buildings still must meet the placement setbacks in the zoning ordinance.
086. 088(B), which can be based on the value of the work performed. The current plumbing-code edition was carried forward by Ord. 278-26 and Ord. 279-26, both passed January 8, 2026, continuing the code package the county first adopted by Ord. 239-21 on June 23, 2021.
Violations & Fines
An unpermitted plumbing job tied to construction work is enforced the same way as any other unpermitted building work: § 156.999 makes it an infraction punishable by a $100 fine with no imprisonment, each day of continued work counted as a separate offense, and a possible injunction from the court. Where chapter 150 itself is violated and no specific penalty applies, § 150.99(A) defaults to § 10.99, a misdemeanor punishable by up to $300 and six months in jail.
Frequently Asked Questions
What plumbing code applies in Bonneville County?
Do I need a permit for plumbing work?
What's the penalty for unpermitted plumbing work?
Sources & Official References
Other rules in Bonneville County
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