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

New stick-built, modular and manufactured one- or two-family homes in unincorporated Juneau County, Wisconsin need a Uniform Dwelling Code (UDC) building permit¹. Wisconsin's UDC covers one- and two-family dwellings built since June 1, 1980¹⁰. Start with the parcel's municipality to confirm how to file; delegated municipalities issue the UDC permit, and otherwise the application goes to Wisconsin DSPS^1,10. Submit plans, required project data, contractor license information and the application fee; the approved fee must be paid before issuance^1,10. Owner-occupants may apply without Dwelling Contractor Certification, but still need the construction or erosion-control permit⁶.

Juneau County's Sanitation & Zoning Department handles county land-use, shoreland and sanitary permits at 650 Prairie Street, Mauston, WI 53948; call (608) 847-9391². For UDC building permits and inspections, use Wisconsin DSPS's delegated-agent list to identify the responsible authority¹.

Local building-permit authorities include Mauston¹¹, New Lisbon¹², Elroy¹³, Town of Necedah¹⁴, Village of Wonewoc¹⁵, Village of Camp Douglas¹⁶, Village of Lyndon Station¹⁷, Village of Union Center¹, Village of Hustler¹, Town of Lyndon¹⁸. Sanitary permits for private sewage systems remain with Juneau County's Sanitation & Zoning Department, with DSPS reviewing plans outside the county's delegated categories^3,19. Required UDC inspections must be performed by appropriately certified personnel; notify the inspector named on the permit when each stage is ready^1,20.

In unincorporated Juneau County, county zoning covers shoreland, wetland and mapped floodplain areas; these rules do not establish general countywide zoning². Floodplain districts include Floodway, Floodfringe, General Floodplain and Flooded Agriculture-Cranberry Farms, with boundaries on official floodplain maps²¹. A county land-use permit is required before floodplain development, repairs, additions or changes of use, including sewer and water facilities²¹.

Shoreland zoning covers land within 1,000 feet of a lake or flowage, 300 feet of a navigable river or stream, and all floodplains; construction requires county approval first⁸. County shoreland rules generally require a 75-foot water setback²². For each main building, shoreland-wetland lots need 20,000 square feet and 100 feet of water frontage without public sewer, or 10,000 square feet and an average 65 feet of frontage with public sewer^23,24.

Local zoning authorities include Mauston²⁵, New Lisbon²⁶, Elroy²⁷, Town of Necedah¹⁴, Village of Necedah²⁸, Village of Wonewoc¹⁵, Village of Camp Douglas²⁹, Village of Lyndon Station¹⁷, Town of Lyndon³⁰. County sanitary permitting remains separate from municipal zoning³.

Every building in Juneau County that uses a private sewage system needs its sanitary permit before any local building permit can be issued³¹. The Sanitation & Zoning Department handles sanitary permits for new systems, replacements, modifications, repairs, reconnections and non-plumbing systems such as outhouses and transfer tanks³. Juneau County may review at-grade and mound systems with design flows up to 1,000 gallons per day, while individual site designs and plans outside the county's delegated categories must go to Wisconsin DSPS; plan review may also be submitted to DSPS^5,19. A licensed plumber must complete the sanitary-permit application³. Wisconsin requires a visual inspection at least once every three years³². Only 0.5% of county soils are free of severe limitations for a conventional drain field, so obtain a site evaluation before buying⁹.

We could not confirm a countywide Juneau County rule for long-term RV living or tiny-home occupancy on an individual private parcel; ask the parcel's town and the Sanitation & Zoning Department². Juneau County's floodplain campground rules require DATCP approval, a county land-use permit, flood-warning procedures and evacuation terms; camping equipment may not be permanently attached, used as a habitable structure or obstruct floodwater flow²¹. Campgrounds need a 72-hour flood-warning procedure²¹. Campground RVs must be highway-ready, satisfy applicable floodplain standards, or leave the floodplain after no more than 180 consecutive days for at least 24 hours²¹. These campground conditions do not confirm permission to live in an RV on an individual private parcel; ask the county department about the proposed use². A new manufactured-home installation needs a UDC permit, which does not settle local placement or occupancy requirements¹.

1. Use the state delegated-agent list to determine whether the parcel's municipality or Wisconsin DSPS handles the UDC permit and inspections¹.

1. Check the site with Juneau County: work in a floodplain-zoned area needs a land-use permit before it begins, and shoreland construction also requires county review^21,22. A floodplain application requires project and ownership details plus a scaled site plan showing waterways, structures, access, septic or water systems, floodplain limits and elevations²¹.

1. Have a licensed plumber apply for the sanitary permit; a local building permit for a home using private sewage cannot be issued first^3,31.

1. Submit the UDC application, plans, required project data, contractor license information and fee to the responsible authority¹.

1. Notify the inspector named on the UDC permit when the footing, foundation and reinforcement, rough-work, insulation and final stages are ready¹.

1. Confirm the final-approval requirement with the responsible UDC authority; we could not confirm a countywide certificate-of-occupancy requirement.

Only 0.5% of Juneau County soils are rated without severe limitations for conventional septic drain fields, so obtain a site evaluation before buying⁹. Ask the Sanitation & Zoning Department to confirm shoreland and floodplain boundaries and the proposed building site².

A smaller sewered shoreland-wetland lot may qualify for a single-family dwelling if it has at least 7,500 square feet and 50 feet of width at both the building setback line and waterline, but a zoning permit is required³³. The use must be allowed, the lot must have been recorded and separately owned from abutting land before the applicable ordinance's effective date, and dimensional requirements must be met insofar as practical; otherwise the ordinary lot-size requirements apply³³. Ask the county zoning administrator to verify eligibility before treating a small waterfront lot as buildable².