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

At a glance

Building permit

Required for new UDC-covered one- and two-family homes¹

Zoning

County zoning applies in all towns; cities and villages control their own zoning⁵

Minimum lot size

Set by district; 40 acres in the A-1 district⁶

Septic

County sanitary program through Planning & Development³

Owner-builder

Available when the owner occupies or will occupy the home; permits still apply⁷

RV living

Under county zoning, camping units are recreational only and cannot be lived in as a residence; temporary uses are limited to 12 months⁸

Tiny home

No express tiny-home rule confirmed; a dwelling still needs a UDC building permit and a parcel-specific zoning answer⁹

Private well

Obtain the applicable county or municipal permit before construction¹⁰

Who to call

Contact details are copied from each office’s official page and were checked against it on October 15, 2026.

Do you need a building permit 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 County.¹ 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 rules.¹¹

Permit requirements for additions and alterations vary by municipality, so the answer may depend on the parcel’s town, city or village.⁴ Iowa County publishes access and utility fees, but those amounts are not a complete building, zoning or sanitary fee schedule.¹² For a new home, settle zoning, sanitary or well, driveway and utility approvals before expecting the building permit to be issued.¹

Who issues building permits in Iowa County, and how do you reach them?

Start with the Iowa County Office of Planning & Development at 222 N. Iowa St., Dodgeville, WI 53533, or call (608) 935-0398.⁹ The county publishes applications for zoning, floodplain, shoreland and sanitary permits, but it does not publish one complete sequence or every decision deadline.¹³

The UDC enforcing office may be a municipality, an authorized inspection agency or the state, depending on delegated authority.¹ 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 sets.¹⁴ New homes require inspections, and the applicant should notify the inspector identified on the UDC permit when work is ready.¹⁵

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.¹⁶¹⁷ Iowa County’s zoning and driveway rules here apply to unincorporated land and adopting towns, not inside the village.⁵

Does Iowa County have zoning?

Yes, but jurisdiction matters. All 14 Iowa County towns had adopted county zoning by 1980, while cities and villages have their own zoning jurisdiction.² 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 allowable.⁵ 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 district.⁶¹⁸ 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 use.⁹ 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 averaging.¹⁹

How do septic permits work in Iowa County?

The Iowa County Office of Planning & Development administers the county sanitary program for private onsite wastewater treatment systems and publishes a sanitary-permit application.³ Contact the sanitation office at (608) 935-0330 or terry.loeffelholz@iowacounty.org before finalizing a house site.²⁰ A new dwelling using a private onsite wastewater system cannot receive its building permit until the sanitary permit has been issued.⁴

Any structure connected to a water source or containing internal plumbing must have a valid sanitary permit before the county zoning permit is issued.²¹

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 cost.²² Once installed, a privately owned septic system must receive a visual inspection at least once every three years, with counties operating the maintenance-tracking program.²³

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

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 additions.⁸ 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 permission.⁸ 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 plan.⁹

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 installations.²⁴ 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 begins.¹ Where plumbing fixtures are not connected to public sewer, Wisconsin requires suitable provision to treat, recycle, disperse or hold wastewater.²⁵

Building a home in Iowa County: what are the steps?

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 authority.²
2. Use Iowa County’s published applications to identify any zoning, shoreland, floodplain or sanitary filing the site needs.¹³
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 permit.⁴
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 apply.²⁶
5. Submit the UDC application, required documents, fees and at least two plan sets to the enforcing municipality or authorized inspection agency.¹⁴
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.¹⁵²⁷

What should you check before buying land in Iowa County?

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 jurisdiction.² For waterfront land, confirm the ordinary high-water mark and shoreland setback before placing a home.¹⁹ 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 fee.²⁸

Investigate soils before treating a listing’s proposed homesite as buildable because only about 1.6% of mapped soils avoid severe conventional drain-field limitations.²² 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.¹²²⁶ Finally, budget for an effective property-tax rate of about 1.6% and a median annual property-tax bill of about $3,864.²⁹³⁰

Watch-outs

• County zoning does not control land inside Iowa County’s cities and villages, including the part of Blanchardville that reaches into the county, which has its own zoning code; use the parcel’s actual municipality before applying a rule.⁵¹⁷
• A private-system sanitary permit must be issued before a new-home building permit can be issued.⁴
• A new or changed driveway serving development may need Town Board approval before county zoning approval, plus separate county- or state-highway permission.²⁶
• Iowa County’s mapped soils rate poorly for conventional drain fields, so investigate the septic site before fixing the house location or purchase budget.²²
• We could not confirm an express tiny-home occupancy rule, accessory-dwelling rule or countywide minimum dwelling size; ask Planning & Development about the specific parcel and proposal.⁹
• An RV or other camping unit cannot be lived in as a residence under the county zoning ordinance, so plan a permitted dwelling rather than relying on a camper.⁸

Sources

1. UDC (Uniform Dwelling Code / One- and Two-Family Dwellings), quoted and re-checked
2. Planning and Development FAQ, quoted and re-checked
3. Sanitation Information, quoted and re-checked
4. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
5. Iowa County Zoning Ordinance, quoted and re-checked
6. Iowa County Zoning Ordinance, quoted and re-checked
7. Instructions for Submitting a UDC Permit Application, quoted and re-checked
8. Iowa County Zoning Ordinance, quoted and re-checked
9. Iowa County Office of Planning & Development (iowacountywi.gov)
10. dsps.wi.gov, quoted and re-checked
11. UDC (Uniform Dwelling Code / One- and Two-Family Dwellings), quoted and re-checked
12. Fees and Taxes, quoted and re-checked
13. Applications, Forms and Documents, quoted and re-checked
14. Wisconsin Administrative Code SPS 320.09 (Wisconsin statewide rule), quoted and re-checked
15. UDC (Uniform Dwelling Code / One- and Two-Family Dwellings), quoted and re-checked
16. Village of Blanchardville: Chapter 125: Building Construction - Village of Blanchardville, WI (Iowa County), quoted and re-checked
17. Village of Blanchardville: Article I: Introduction - Village of Blanchardville, WI (Iowa County), quoted and re-checked
18. Iowa County Zoning Ordinance, quoted and re-checked
19. Wisconsin’s Shoreland Management Program (Wisconsin statewide rule), quoted and re-checked
20. Iowa County Planning & Development — Sanitation (iowacountywi.gov)
21. Iowa County Zoning Ordinance, quoted and re-checked
22. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
23. Wisconsin Maintenance Program (Wisconsin statewide rule), quoted and re-checked
24. Iowa County Zoning Ordinance, quoted and re-checked
25. Wisconsin Administrative Code, SPS 382 (Wisconsin statewide rule), quoted and re-checked
26. Iowa County Zoning Ordinance, quoted and re-checked
27. Iowa County Zoning Ordinance, quoted and re-checked
28. Zoning, Floodplain & Shoreland Permit Application Packet, quoted and re-checked
29. Effective property tax rate: Bolthole Index county data
30. Median property tax bill: Bolthole Index county data

Written October 15, 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.