Mosinee, WI Building Safety: Plumbing Permits (2026)
Key Facts
- Code adopted
- Wis. Adm. Code Comm. chs. 81-87
- Permit exemption
- Leakage or stoppage repairs only
- Licensing
- State-licensed plumber required
- Owner exception
- Owner-occupied single-family home, with permit
- Duplex rule
- Separate water/sewer service per unit
Summary
Mosinee adopts the Wisconsin state plumbing code by reference and requires a building inspector permit before any plumbing or drainage work is installed or altered, under Sec. 42-1367. Only leakage or stoppage repairs are exempt, and all plumbing work in the city must be done by a state-licensed plumber, except limited owner repairs on an owner-occupied single-family home.
(a)State code applies. The construction, reconstruction, installation and alteration of all plumbing, drainage and plumbing ventilation shall conform to the Wis. Adm. Code Comm. chs. 81—87 inclusive (state plumbing code), which is adopted by reference as a part of this section.(b)Permit required. No plumbing or drainage of any kind shall be installed or altered, except that leakage or stoppage repairs may be made without first securing a permit therefor from the building inspector. ... (c)Licensed plumber required. All plumbing work shall be done only by a plumber licensed by the state, except that a property owner may make repairs or installations in a single-family building owned and occupied by him as his home provided that a permit is issued and the work is done in compliance with the provisions of this article.
Full Breakdown
Sec. 42-1367(a) adopts the Wis. Adm. chs. 81 through 87, the state plumbing code, by reference for the construction, reconstruction, installation and alteration of plumbing, drainage and plumbing ventilation in the City of Mosinee. Subsection (b) requires a permit from the building inspector before any plumbing or drainage is installed or altered, with the only exemption being leakage or stoppage repairs; the application must state the planned work, alterations, equipment and materials, and any deviation from the plan must go back to the building inspector for approval.
Subsection (c) limits who may do the work: plumbing must be done by a plumber licensed by the state, except that a property owner may make repairs or installations in a single-family building he owns and occupies as his home, provided a permit is issued and the work complies with the article. Subsection (d) requires the person doing the work to notify the building inspector before it is covered up, so the inspector can inspect it; if it conforms to the state plumbing code, the inspector issues a certificate of compliance, and no one may use or permit use of the plumbing or drainage until it has been inspected and approved. Sec. 42-1375 separately requires each unit of a duplex to have its own, separate water and sewer service connections.
Violations & Fines
Installing or altering plumbing or drainage without a permit, other than a leakage or stoppage repair, violates Sec. 42-1367(b). Using plumbing or drainage before the building inspector inspects and approves it violates subsection (d), and doing plumbing work without a state plumbing license, outside the narrow owner-occupied exception, violates subsection (c). Sec. 42-1355 lets the building inspector revoke the permit by written notice at the site for noncompliance.
Frequently Asked Questions
Do I need a permit to fix a leaky pipe in Mosinee?
Can I do my own plumbing work on my house?
What happens after plumbing work is finished?
Do the two units of a duplex need separate plumbing?
Sources & Official References
Other rules in Mosinee
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Plumbing Permits in Nearby Cities
How other cities in Marathon County handle plumbing permits.