A new one- or two-family home in Iowa County, Wisconsin needs an approved building permit before construction begins.1 County zoning applies in all towns, while cities and villages have their own zoning jurisdiction.2 The Iowa County Office of Planning & Development is the practical first call for county land-use questions, and its sanitarian is the county contact for private septic systems.34
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 zoning2
- Septic
- County sanitary permit through Planning & Development4
- Owner-builder
- Available when the owner occupies or will occupy the home; permits still apply5
- RV living
- Private-land occupancy rule not confirmed; ask Planning & Development3
- Tiny home
- County occupancy treatment not confirmed; ask Planning & Development3
- Private well
- Obtain the applicable county or municipal permit before construction6
Who to call
Planning & zoning
Iowa County Office of Planning & Development
County land-use codes and ordinances; contact for building, zoning and floodplain questions
222 N. Iowa St., Dodgeville, WI 53533
Septic permits
Iowa County Planning & Development — Sanitation
Sanitary permit applications and private onsite wastewater questions
222 N. Iowa St., Dodgeville, WI 53533
Roads & driveways
Iowa County Highway Department
County highway driveway applications and work in the right-of-way
1215 N. Bequette St., Dodgeville, WI 53533
Contact details are copied from each office’s official page and were checked against it on September 27, 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 approved plans and an issued, posted 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.7
Permit requirements for additions and alterations vary by municipality, so the answer may depend on the parcel’s town, city or village.8 Fees also vary because the municipality sets plan-review, inspection and issuance charges.9 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) 935-0398.3 The office administers land-use codes and ordinances and is the county contact for sorting out the approvals attached to a rural parcel.3
Wisconsin allows UDC enforcement through municipal or county building inspectors or the state, and the correct enforcing office can depend on the municipality.10 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.11 During construction, inspections are required before each phase is covered; after a ready-work inspection request, the inspector has two business days before the work may be covered.12
Does Iowa County have zoning?
Yes, but jurisdiction matters. All fourteen 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.2 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.3 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.13
How do septic permits work in Iowa County?
The Iowa County Office of Planning & Development’s sanitarian administers the county sanitary program for private onsite wastewater treatment systems.4 Contact the sanitation office at (608) 935-0330 or [email protected] and ask for the sanitary-permit application before finalizing a house site.14 A new dwelling using a private onsite wastewater system cannot receive its building permit until the sanitary permit has been issued.8
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.15 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.16
Can you live in an RV or tiny home on land in Iowa County?
We could not confirm a county rule that generally allows living in an RV on private land in Iowa County. The statewide campsite rules in the research apply to Wisconsin State Park System campsites, not to residential occupancy on a private parcel, so they do not answer this question. Ask Planning & Development about the parcel’s zoning district, proposed duration, utilities and wastewater plan.3
We also 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, while 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.17
Building a home in Iowa County: what are the steps?
- 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.18
- Ask Planning & Development about county land-use, shoreland and floodplain approvals that apply to the site.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.8
- Confirm driveway authority. The Iowa County Highway Department publishes driveway materials for county highways, while WisDOT requires a connection permit for access to a state highway.1920
- Submit the UDC application, required documents, fees and at least two plan sets to the enforcing municipality or authorized inspection agency.11
- Build only after permit issuance, schedule phase inspections before covering work, and occupy only after a final inspection finds no major health or safety violations.121
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.18 For waterfront land, confirm the ordinary high-water mark and shoreland setback before placing a home.13 For mapped floodplain land, development typically needs land-use and building permits, and new structures, wells and sewage systems are prohibited in the floodway.22
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.15 Confirm road access with the maintaining authority, and contact the Highway Department for a proposed county-highway driveway.19 Finally, budget with local carrying costs in mind: the effective property-tax rate is about 1.6%, and the median annual property-tax bill is about $3,864.2324
Watch-outs
- County zoning does not control land inside Iowa County’s cities and villages; use the parcel’s actual municipality before applying a rule.2
- A private-system sanitary permit must be issued before a new-home building permit can be issued.8
- Iowa County’s mapped soils rate poorly for conventional drain fields, so investigate the septic site before fixing the house location or purchase budget.15
- We could not confirm general private-land RV occupancy, tiny-home occupancy or a countywide minimum dwelling size; ask Planning & Development about the specific parcel and proposal.3
Sources
- Wisconsin’s Uniform Dwelling Code, quoted and re-checked
- Planning and Development FAQ, quoted and re-checked
- Iowa County Office of Planning & Development (iowacountywi.gov)
- Iowa County WI - Sanitation Information (2026 county census)
- Wisconsin’s Uniform Dwelling Code, quoted and re-checked
- Wisconsin’s Uniform Dwelling Code, quoted and re-checked
- Wisconsin’s Uniform Dwelling Code, quoted and re-checked
- Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
- Wisconsin Administrative Code SPS 302.34 (Wisconsin statewide rule), quoted and re-checked
- Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
- Wisconsin Administrative Code SPS 320.09 (Wisconsin statewide rule), quoted and re-checked
- Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
- Wisconsin’s Shoreland Management Program (Wisconsin statewide rule), quoted and re-checked
- Iowa County Planning & Development — Sanitation (iowacountywi.gov)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Wisconsin Maintenance Program (Wisconsin statewide rule), quoted and re-checked
- Wisconsin Administrative Code, SPS 382 (Wisconsin statewide rule), quoted and re-checked
- Planning and Development FAQ, quoted and re-checked
- Iowa County Highway Department (iowacountywi.gov)
- State highway connection permits (driveways & more) (Wisconsin statewide rule), quoted and re-checked
- Wisconsin’s Uniform Dwelling Code, quoted and re-checked
- Floodplain Development Basics (Wisconsin statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written September 27, 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.