Building permits, zoning and land rules in Iowa County, Wisconsin

Yes. A new one- or two-family dwelling covered by Wisconsin’s Uniform Dwelling Code needs an issued building permit before work begins in Iowa County¹. The statewide residential code covers new one- and two-family dwellings built since June 1, 1980, while older homes, accessory buildings and larger residential buildings can fall under different rules¹.

Permit requirements for additions and alterations vary by municipality, so the answer may depend on the parcel’s town, city or village⁴. Iowa County publishes access and utility fees, but those amounts are not a complete building, zoning or sanitary fee schedule⁸. For a new home, settle zoning, sanitary or well, driveway and utility approvals before expecting the building permit to be issued¹.

Start with the Iowa County Office of Planning & Development at 222 N. Iowa St., Dodgeville, WI 53533, or call (608) 935-0398⁷. The county publishes applications for zoning, floodplain, shoreland and sanitary permits, but it does not publish one complete sequence or every decision deadline⁹.

The UDC enforcing office may be a municipality, an authorized inspection agency or the state, depending on delegated authority¹. A complete UDC application goes to the municipality or its authorized inspection agency with fees, supporting documents, prerequisite local permits and at least two plan sets¹⁰. New homes require inspections, and the applicant should notify the inspector identified on the UDC permit when work is ready¹.

One village reaches into Iowa County from mostly Lafayette County: Blanchardville requires its own building permit from the Municipal Building Inspector and has its own zoning code^11,12. Iowa County’s zoning and driveway rules here apply to unincorporated land and adopting towns, not inside the village⁵.

Yes, but jurisdiction matters. All 14 Iowa County towns had adopted county zoning by 1980, while cities and villages have their own zoning jurisdiction². A buyer should therefore identify the parcel’s municipality and zoning district before relying on a county-level answer.

County zoning determines where listed uses may occur, and a use omitted from a district is prohibited unless a zoning-change process makes it allowable⁵. Lot sizes depend on the district: the A-1 district requires a minimum lot size of 40 acres, and the official zoning map on file at the county shows each district⁵. We could not confirm a countywide minimum dwelling size, accessory-dwelling rule, or express tiny-home occupancy rule. Ask Planning & Development how the mapped district treats the proposed structure and use⁷. Shoreland parcels add another layer: buildings generally must sit at least 75 feet from the ordinary high-water mark, subject to listed exceptions and setback averaging¹³.

The Iowa County Office of Planning & Development administers the county sanitary program for private onsite wastewater treatment systems and publishes a sanitary-permit application³. Contact the sanitation office at (608) 935-0330 or terry.loeffelholz@iowacounty.org before finalizing a house site³. A new dwelling using a private onsite wastewater system cannot receive its building permit until the sanitary permit has been issued⁴.

Any structure connected to a water source or containing internal plumbing must have a valid sanitary permit before the county zoning permit is issued⁵.

Only about 1.6% of mapped county soils avoid a “very limited” rating for conventional septic drain fields, so a site evaluation may materially affect system choice and cost¹⁴. Once installed, a privately owned septic system must receive a visual inspection at least once every three years, with counties operating the maintenance-tracking program¹⁵.

Under the Iowa County zoning ordinance, camping units such as RVs are recreational only and cannot be occupied as a residence, may not discharge gray or black water, and must stay movable with no attached additions⁵. The Planning Committee can approve a temporary use for a specified period of no more than 12 consecutive months, and any rental use needs zoning-district permission⁵. The statewide campsite rules in the research apply to Wisconsin State Park System campsites, not to a private parcel. Ask Planning & Development about your parcel's zoning district, duration and wastewater plan⁷.

Manufactured homes are handled through the county's mobile/manufactured-home district and park provisions, and the state Uniform Dwelling Code also applies to new manufactured-home installations⁵. We could not confirm an express Iowa County tiny-home occupancy rule or countywide minimum dwelling size. A tiny house intended as a dwelling still needs a parcel-specific zoning answer, and a new one- or two-family dwelling covered by the UDC needs a building permit before construction begins¹. Where plumbing fixtures are not connected to public sewer, Wisconsin requires suitable provision to treat, recycle, disperse or hold wastewater¹⁶.

1. Identify whether the parcel lies in a town, city or village, then confirm its zoning district and allowed residential use with the correct zoning authority².
2. Use Iowa County’s published applications to identify any zoning, shoreland, floodplain or sanitary filing the site needs⁹.
3. Arrange the sanitary permit for private septic, or the applicable water and sewer approvals; a private-system sanitary permit comes before the new-home building permit⁴.
4. Get Town Board driveway approval before the county zoning permit when development involves a new driveway or an existing driveway serving open land; county- or state-highway approval may also apply⁵.
5. Submit the UDC application, required documents, fees and at least two plan sets to the enforcing municipality or authorized inspection agency¹⁰.
6. Build only after permit issuance, notify the inspector identified on the UDC permit as inspections become ready, and occupy only after a final inspection finds no major health or safety violations^1,5.

Check the zoning map and allowed use with the authority for the parcel’s town, city or village; city and village zoning is separate from county jurisdiction². For waterfront land, confirm the ordinary high-water mark and shoreland setback before placing a home¹³. Iowa County lists a $200 permit fee for development in each applicable shoreland or floodplain jurisdiction, and a required special exception adds a $500 permit-and-hearing fee¹⁷.

Investigate soils before treating a listing’s proposed homesite as buildable because only about 1.6% of mapped soils avoid severe conventional drain-field limitations¹⁴. A single-family Iowa County access permit and inspection costs $175, but a county-highway access cannot be installed, altered, replaced or extended before approval^5,8. Finally, budget for an effective property-tax rate of about 1.6% and a median annual property-tax bill of about $3,864¹⁴.