Sun Prairie, WI Building Safety: Plumbing Permits (2026)
Key Facts
- State code adopted
- Wis. Adm. Code SPS 381-391
- Permitting official
- City building inspector
- Who may obtain permit
- Licensed master plumbers
- Owner exception
- Owner-occupied single-family residence only
- Compulsory inspection
- Plumbing stays exposed until inspected
Summary
Sun Prairie adopts the Wisconsin State Plumbing Code and Chapter 145, Wisconsin Statutes, and requires a permit from the city building inspector before any plumbing is installed, altered or repaired, issued only to a licensed master plumber except for an owner-occupied single-family home.
The provisions and regulations of Chapter 145, Wisconsin Statutes, and Wisconsin Administrative Code Chapters SPS 381 through 391 are made a part of this chapter by reference and shall extend over and govern the installation of all plumbing installed, altered or repaired in the city. ... No plumbing shall be installed in the city without first filing an application, with accompanying fee as provided in Section 15.04.020 of this title; with the building inspector, obtaining approval thereof and a permit therefrom. ... Licensed master plumbers may only receive such permits, except a permit may be issued to a property owner to install plumbing in a single-family residence which is owned and occupied by such owner as his or her home.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 71).
Full Breakdown
010 adopts Chapter 145, Wisconsin Statutes, and Wisconsin Administrative Code Chapters SPS 381 through 391 by reference, along with their future amendments, to govern plumbing installed, altered or repaired within the City of Sun Prairie. 020, and obtain approval and a permit before starting, a requirement that also reaches any building outside the city before it may connect to the city's sewer or water system. Only licensed master plumbers may receive a plumbing permit, with one exception: a property owner may obtain a permit to install plumbing in a single-family residence that the owner both owns and occupies as their home.
040(B). 030 requires the plumber to notify the plumbing inspector when the job is ready for inspection, and all plumbing must stay exposed and uncovered until the inspector completes that examination; the inspector can require a water or air pressure test on any part of the installation. Inspection fees are billed only after the plumbing inspector certifies that the completed work conforms to the applicable state codes and city ordinances.
Violations & Fines
Installing plumbing without the required permit, or having unlicensed work performed where a master plumber is required, is enforced under the Building Code's general provisions and the city's general penalty in Section 1.24.010, a forfeiture of $5 to $500 for a first offense and up to $1,000 for a repeat offense, with each day of continued unpermitted work a separate violation.
Frequently Asked Questions
Can a homeowner do their own plumbing in Sun Prairie?
What state plumbing code applies in Sun Prairie?
Do I need to leave plumbing exposed for inspection?
Sources & Official References
Other rules in Sun Prairie
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Plumbing Permits in Nearby Cities
How other cities in Dane County handle plumbing permits.