Ashland County, WI zoning map, flood zone and property lines by address
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Towns in Ashland County: Ashland.
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 has 42 FIRM panels covering Ashland County, the newest effective May 2023; 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 Ashland 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 Ashland lot shows the same lines the real property lister draws. Ashland County covers about 668,781 acres of land and 798,330 acres of water.
Mapped lines are approximate. The Ashland County real property lister keeps the parcel record (Ashland 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 Ashland County, Ashland zones the land inside its 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 Ashland 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 Ashland 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. Ashland County is soil survey area WI003, Ashland County, Wisconsin, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Ashland County needs a permit from the Ashland County sanitary permit office under the state POWTS rules (Department of Safety and Professional Services).
Setbacks
Setbacks in Ashland 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 Ashland for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Ashland lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Ashland County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA has 42 flood map panels covering Ashland County, the newest effective May 2023. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Ashland County?
Open the Wisconsin map, type the address, and the parcel outline from the Ashland 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 Ashland County?
Zoning in Ashland County is set by the county, the town or the city or village, depending on where the lot is (such as Ashland). 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 Ashland 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 Ashland 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 Ashland County?
Yes. A new or changed septic system in Ashland County needs a permit from the Ashland 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 WI003 (Ashland County, Wisconsin).
What can I build on 5 acres in Ashland County?
Zoning in Ashland County is set by the county, the town or the city or village, depending on where the lot is (such as Ashland). 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 Ashland County website.
What are the residential setbacks in Ashland County (2026)?
Setbacks in Ashland 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 Ashland County website.
Next to Ashland County: Bayfield County, Iron County, Price County, Sawyer County.
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