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Rock County, WI Building Safety: Plumbing Permits (2026)

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

Key Facts

Governing provision
Rock County Code § 6.121
Permit required for
New systems, tank purchase/construction
Permit expiration
2 years from issuance
Plan signer
Master Plumber / Restricted Service
No-permit remedy
Department may post stop-work order
Enforcement chapter
Rock County Code § 6.111

Summary

Rock County's Public Health Department requires a Sanitary Permit before any new private sewage system is installed or a septic/treatment tank is purchased or built. The rule ties the State Uniform Plumbing Code to the county and covers replacements, repairs and non-plumbing sanitation systems too.

City-specific rules exist: Milton, and Beloit have their own plumbing permits rules that differ from Rock County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

(1) General Provisions - The provisions of this section are meant to relate the State Uniform Plumbing Code to Rock County and also to meet the requirements of Wis. Stats. § 59.70(5). ... (3) Sanitary Permits (A) No new private sewage system shall be installed or septic or other treatment tank purchased or constructed until a Sanitary Permit has been issued by the Department. ... (D) Sanitary Permits expire 2 years after the date of issuance and can be renewed prior to expiration.

View official code

Full Breakdown

121 of the Rock County Code of Ordinances states its provisions "are meant to relate the State Uniform Plumbing Code to Rock County and also to meet the requirements of Wis. 121(3)(C)). 121(3)(D). Plan submissions must include a soil and site evaluation by a Certified Soil Tester, the State Plumbing Application under Wis. Admin. 121(4)(A), (E)). 121(2)(B)). 111 of the Ordinance, the county's general nuisance-and-violation enforcement chapter.

Violations & Fines

Installing or replacing a private sewage system without a Sanitary Permit exposes the owner to a stop-work order posted on the property and enforcement action under Section 6.111, including a written correction order, citations under Section 6.111(3)(A), and forfeitures set by County Resolution 08-8A-054, with up to 60 days in county jail if the forfeiture goes unpaid.

Frequently Asked Questions

Do I need a permit to install a septic system in Rock County?
Yes. Section 6.121(3)(A) bars installing a new private sewage system, or purchasing or constructing a septic or other treatment tank, until the Public Health Department has issued a Sanitary Permit for the project.
How long does a Rock County Sanitary Permit last?
Section 6.121(3)(D) sets a two-year expiration from the date of issuance. You can renew before it lapses, but the renewal is re-evaluated against whatever regulations are in force at that later time, not the original ones.
Who has to sign the plans for a private sewage system?
Section 6.121(4)(E) requires all plans and applications to be signed by a Master Plumber or a Master Plumber Restricted Service, who is responsible for ensuring the installation meets the section and all applicable state plumbing codes.
What happens if work starts without a permit?
Section 6.121(2)(B) lets the Department post a stop-work order in a conspicuous place on the premises, halting all activity until the order is removed, in addition to enforcement action under Section 6.111 of the Ordinance.

Sources & Official References

Other rules in Rock County

Parking Rules: Overnight ParkingSome RestrictionsParking Rules: Street Parking LimitsSome RestrictionsNoise Ordinances: Amplified Music & Outdoor SoundSome RestrictionsNoise Ordinances: Barking DogsSome RestrictionsParking Rules: Abandoned VehiclesSome RestrictionsFence Regulations: Neighbor Fence RulesSome Restrictions

All Rock County rules

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Plumbing Permits in Cities Across Rock County

Beloit, WIMilton, WI