Building permits, zoning and septic rules in Kewaunee County, Wisconsin

At a glance

Building permit

Required statewide under the Uniform Dwelling Code¹

Zoning

No countywide zoning; shoreland/floodplain only — general zoning is set town by town²

Septic permits

County Land & Water Conservation Dept, under the Sanitary Ordinance (Ch. 15)³⁵

Owner-builder

Owner-occupants may pull their own UDC construction permit⁶⁷

Septic soils

Only 6.4% of soil has no severe limit for a conventional drain field⁴

Shoreland setback

75 ft minimum from the ordinary high-water mark⁸

Property tax

1.5% effective rate; ~$3,083/yr median bill⁹¹⁰

Terrain

94.8% of land at 15% slope or less¹¹

Who to call

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

Do you need a building permit in Kewaunee County, Wisconsin?

Wisconsin's Uniform Dwelling Code is the statewide building code for one- and two-family dwellings built since June 1, 1980, and it applies in Kewaunee County the same as everywhere else in the state¹²¹. Construction can begin only after plans are approved and the building permit is issued and posted, and at least two sets of plans must be submitted with the application¹³¹⁴. An owner who currently occupies, or will occupy, the finished home can take out the construction and erosion-control permits directly, without going through a state-certified Dwelling Contractor, though plumbing and electrical work still generally require licensed professionals⁶⁷. Expect a $30 state permit-seal fee on top of whatever fee your municipality sets by ordinance¹⁵.

Who enforces building permits in Kewaunee County, and how do you reach them?

Wisconsin's Uniform Dwelling Code is enforced by municipal or county building inspection departments, or by the state's Division of Industry Services where no local department has taken on that role¹⁶. The City of Kewaunee and the City of Algoma have delegated UDC authority through their municipalities¹⁷¹⁸. The Town of Ahnapee also has delegated UDC authority and a listed inspector¹⁹. We could not confirm which inspection agency serves other unincorporated Kewaunee County parcels, so ask the clerk for the town containing the parcel who reviews plans, issues the UDC permit and performs inspections. For shoreland, floodplain and septic questions, call the county's Land & Water Conservation Department²⁰.

Does Kewaunee County have zoning?

Kewaunee County has no general countywide zoning ordinance of its own; the county's role is shoreland and floodplain zoning, administered by the Land & Water Conservation Department, while general land-use zoning outside the shoreland is set by each town, where that town has adopted its own zoning²²⁰. Wisconsin counties can adopt a countywide zoning ordinance under state law, but county zoning only applies in a town that has voted to adopt it, and a town outside county zoning may be unzoned or run its own town ordinance²¹. Within 75 feet of the ordinary high-water mark of a lake or stream, state shoreland rules set a 75-foot minimum building setback and cap structures at 35 feet tall, enforced through the county's shoreland ordinance⁸²². Because general zoning here is a town-by-town patchwork, confirm your specific town's rules on RVs, tiny homes, minimum home size and setbacks before you assume anything applies countywide².

How do septic permits work in Kewaunee County?

Septic, or POWTS, permits for unincorporated Kewaunee County go through the county's Land & Water Conservation Department under the Kewaunee County Sanitary Ordinance, Chapter 15, which covers every municipality in the county that lacks public sewer³⁵. Statewide, POWTS plans are reviewed by the state Department of Safety and Professional Services, and larger or mixed-wastewater systems can require a joint DNR/DSPS review²³. Once a system is installed, it must be visually inspected at least once every three years, and counties operate the state's maintenance-tracking program and send reminders to landowners²⁴. A building without a public-sewer connection still needs an approved way to treat, recycle, disperse or hold its wastewater — the state does not pre-approve any specific composting toilet, privy or holding tank²⁵. The soil is the real constraint here: only 6.4% of Kewaunee County's soil carries no severe limitation for a conventional drain field, so get a site evaluation from Land & Water Conservation before you commit to a parcel⁴⁵.

Can you live in an RV or tiny home on your land in Kewaunee County?

This guide could not confirm a countywide rule on living in an RV or occupying a tiny home on unincorporated Kewaunee County land, because that depends on your specific town's zoning — the county itself has no general zoning ordinance outside the shoreland². Wisconsin's rule limiting a campsite to one recreational vehicle, with a reservation required, governs camping at state park campgrounds; it does not answer whether you can live in an RV on land you own²⁶. A manufactured home can be installed and occupied once it passes a final inspection with no major health or safety violations, provided local zoning and sanitary requirements are also satisfied²⁷. Confirm RV and tiny-home occupancy rules with your town's zoning administrator, and with the county's Land & Water Conservation Department if the parcel sits in the shoreland²⁰.

Building a home in Kewaunee County: the steps, in order

First, confirm zoning for your parcel with your town's zoning administrator, or with the county in shoreland areas, before you buy²²⁰. Second, get a soil evaluation early, since only 6.4% of the county's soil carries no severe limitation for a conventional septic drain field⁴. Third, apply for your sanitary permit with the county's Land & Water Conservation Department under the Sanitary Ordinance before construction⁵³. Fourth, submit your Uniform Dwelling Code building-permit application, with at least two sets of plans, to your town or the responsible inspection agency, and wait for plan approval and a posted permit before you begin¹⁴¹³. Fifth, call for inspection before covering up each phase of construction; your inspector has two business days after your request to inspect before you may cover the work²⁸. Sixth, if you're drilling a well that isn't a high-capacity well, get your Well Construction Notification Number first, and file the Well Construction Report within thirty days after²⁹. Seventh, finish your home's exterior within two years of permit issuance and pass a final inspection with no major health or safety violations before you take occupancy³⁰.

What to check before you buy land in Kewaunee County

Soils: only 6.4% of Kewaunee County's soil carries no severe limitation for a conventional septic drain field, so a site evaluation before you buy is close to essential⁴. Zoning: confirm your specific town's zoning, since the county has no general zoning ordinance of its own outside the shoreland². Water: if you plan to drill a well that isn't a high-capacity well, budget for the state notification process, and check whether your town has an additional well-permit ordinance²⁹. Flood risk: in a floodway, new structures, hazardous-material storage, and wells or sewage systems are prohibited outright, and floodfringe structures need their first floor at least two feet above base flood elevation³¹. Access: a driveway connecting to a state highway needs a WisDOT connection permit, which costs nothing to apply for³². Terrain: 94.8% of the county's land sits at 15% slope or less, among the flattest ground you'll find for building and farming, though flat ground alone doesn't fix poor septic soils¹¹. Taxes: Kewaunee County's effective property tax rate runs about 1.5%, with a median bill near $3,083 a year⁹¹⁰. If you're weighing a short-term rental, Wisconsin requires a DATCP lodging permit for stays rented to tourists or transients³³.

Watch-outs

• Wisconsin's rule limiting a state park campsite to one recreational vehicle governs camping at state parks, not what you can do on land you own in Kewaunee County — don't read it as settling whether you can live in an RV on your parcel²⁶.
• Kewaunee County has no general countywide zoning ordinance; each town sets its own rules outside the shoreland, so 'the county has no zoning' does not mean your specific town has no rules².
• The cities of Kewaunee and Algoma and the Town of Ahnapee have identified UDC arrangements, but we could not confirm the inspection agency for other unincorporated parcels; ask the relevant town clerk before filing¹⁷¹⁸¹⁹.

Sources

1. Wisconsin DSPS - Uniform Dwelling Code (2026 county census)
2. Kewaunee County Land & Water Conservation - Zoning (Shoreland/Floodplain) (2026 county census)
3. Kewaunee County Sanitary Ordinance (Chapter 15) (2026 county census)
4. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
5. Kewaunee County Land & Water Conservation Department, Sanitation Division (kewauneeco.org)
6. Wisconsin DSPS - Building a Home in Wisconsin (UDC Guide) (2026 county census)
7. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
8. Wisconsin’s Shoreland Management Program (Wisconsin statewide rule), quoted and re-checked
9. Effective property tax rate: Bolthole Index county data
10. Median property tax bill: Bolthole Index county data
11. Share of land at 15% slope or less: Bolthole Index county data
12. One- & Two-Family (Uniform Dwelling Code) (Wisconsin statewide rule), quoted and re-checked
13. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
14. Wisconsin Administrative Code SPS 320.09 (Wisconsin statewide rule), quoted and re-checked
15. Wisconsin Administrative Code SPS 302.34 (Wisconsin statewide rule), quoted and re-checked
16. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
17. Wisconsin Municipalities with Delegated Authority for the Uniform Dwelling Code (UDC) and for Camping Units, quoted and re-checked
18. Wisconsin Municipalities with Delegated Authority for the Uniform Dwelling Code (UDC) and for Camping Units, quoted and re-checked
19. Wisconsin Municipalities with Delegated Authority for the Uniform Dwelling Code (UDC) and for Camping Units, quoted and re-checked
20. Kewaunee County Land & Water Conservation Department (kewauneeco.org)
21. Local Land Use Regulations and Comprehensive Planning Status Inventory Project (Wisconsin statewide rule), quoted and re-checked
22. Minimum Shoreland Wetland Zoning Model Ordinance (Wisconsin statewide rule), quoted and re-checked
23. Private Onsite Wastewater Treatment Systems (POWTS) (Wisconsin statewide rule), quoted and re-checked
24. Wisconsin Maintenance Program (Wisconsin statewide rule), quoted and re-checked
25. Wisconsin Administrative Code, SPS 382 (Wisconsin statewide rule), quoted and re-checked
26. Camping Rules — Wisconsin State Park System (Wisconsin statewide rule), quoted and re-checked
27. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
28. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
29. Well and heat exchange notification (Wisconsin statewide rule), quoted and re-checked
30. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
31. Floodplain Development Basics (Wisconsin statewide rule), quoted and re-checked
32. State highway connection permits (driveways & more) (Wisconsin statewide rule), quoted and re-checked
33. Lodging Establishments (Wisconsin statewide rule), quoted and re-checked

Written September 28, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.