Iowa County, WI zoning map, flood zone and property lines by address
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Towns in Iowa County: Dodgeville, Mineral Point, Barneveld.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's countywide study for Iowa County has 155 FIRM panels, the newest effective December 2015; no coastal V zones are mapped in it.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for an Iowa house comes from a licensed surveyor and is often on file with the county or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the Wisconsin statewide parcel layer (from each county, compiled by the State Cartographer), so an Iowa lot shows the same lines the real property lister draws. Iowa County covers about 488,127 acres of land and 3,427 acres of water.
Mapped lines are approximate. The Iowa County real property lister keeps the parcel record (Iowa County website); a licensed surveyor sets the true corners.
Zoning
In Wisconsin zoning is set by the county, the town or the city or village, depending on where the lot is: in Iowa County, Dodgeville, Mineral Point, Barneveld each zone the land inside their limits. ParcelSheet shows the use code on the lot's parcel record and the municipality it sits in; the county, town or city zoning office has the district, the uses it allows and the lot size it needs. The Iowa County website lists the county's municipalities.
ADU and guest houses
Under Wisconsin's zoning laws (Wis. Stat. 59.69 for counties, 60.61 for towns and 62.23 for cities), the county, the town or the city or village, depending on where the lot is can allow an accessory dwelling unit on a lot with a house. Whether an Iowa lot can add one depends on its district; the county, town or city zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Iowa County is soil survey area WI049, Iowa County, Wisconsin, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Iowa County needs a permit from the Iowa County sanitary permit office under the state POWTS rules (Department of Safety and Professional Services).
Setbacks
Setbacks in Iowa County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county, town or city zoning office gives them for the lot's district, and Dodgeville, Mineral Point, Barneveld for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Iowa lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Iowa County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's countywide flood map for Iowa County has 155 panels, the newest effective December 2015. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Iowa County?
Open the Wisconsin map, type the address, and the parcel outline from the Iowa County real property lister shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Iowa County?
Zoning in Iowa County is set by the county, the town or the city or village, depending on where the lot is (such as Dodgeville, Mineral Point). ParcelSheet shows the use code on the parcel record and names the municipality; the county, town or city zoning office has the final word.
Can I build an ADU in Iowa County?
Under Wisconsin's zoning laws (Wis. Stat. 59.69 for counties, 60.61 for towns and 62.23 for cities), the county, the town or the city or village, depending on where the lot is can allow an accessory dwelling unit, and each sets its own rules. In Iowa County ask the county, town or city zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Iowa County?
Yes. A new or changed septic system in Iowa County needs a permit from the Iowa County sanitary permit office under the state POWTS rules (Department of Safety and Professional Services). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area WI049 (Iowa County, Wisconsin).
What can I build on 5 acres in Iowa County?
Zoning in Iowa County is set by the county, the town or the city or village, depending on where the lot is (such as Dodgeville, Mineral Point). The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the county, town or city zoning office has the district and its rules. See the Iowa County website.
What are the residential setbacks in Iowa County (2026)?
Setbacks in Iowa County come from the zoning code of the municipality the lot sits in: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the county, town or city zoning office gives them for the district. See the Iowa County website.
Next to Iowa County: Dane County, Grant County, Green County, Lafayette County, Richland County, Sauk County.
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