Oliver County, ND zoning map, flood zone and property lines by address
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Towns in Oliver County: Center.
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 Oliver County has 17 FIRM panels, the newest effective March 2025; 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 Oliver 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 North Dakota GIS Hub parcel layer (from each county), so an Oliver lot shows the same lines the county director of tax equalization draws. Oliver County covers about 462,338 acres of land and 5,554 acres of water.
Mapped lines are approximate. The Oliver County director of tax equalization keeps the parcel record (Oliver County website); a licensed surveyor sets the true corners.
Zoning
In North Dakota zoning is set by the county, the township or the city, depending on where the lot is: in Oliver County, Center 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, township or city zoning office has the district, the uses it allows and the lot size it needs. The Oliver County website lists the county's municipalities.
ADU and guest houses
Under North Dakota's zoning laws (N.D. Cent. Code chapters 11-33 for counties and 40-47 for cities), the county, the township or the city, depending on where the lot is can allow an accessory dwelling unit on a lot with a house. Whether an Oliver lot can add one depends on its district; the county, township 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. Oliver County is soil survey area ND065, Oliver County, North Dakota, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Oliver County needs a permit from the Oliver County local public health unit (installers are licensed by the ND Department of Environmental Quality).
Setbacks
Setbacks in Oliver County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county, township or city zoning office gives them for the lot's district, and Center for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Oliver lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Oliver 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 Oliver County has 17 panels, the newest effective March 2025. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Oliver County?
Open the North Dakota map, type the address, and the parcel outline from the Oliver County director of tax equalization 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 Oliver County?
Zoning in Oliver County is set by the county, the township or the city, depending on where the lot is (such as Center). ParcelSheet shows the use code on the parcel record and names the municipality; the county, township or city zoning office has the final word.
Can I build an ADU in Oliver County?
Under North Dakota's zoning laws (N.D. Cent. Code chapters 11-33 for counties and 40-47 for cities), the county, the township or the city, depending on where the lot is can allow an accessory dwelling unit, and each sets its own rules. In Oliver County ask the county, township 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 Oliver County?
Yes. A new or changed septic system in Oliver County needs a permit from the Oliver County local public health unit (installers are licensed by the ND Department of Environmental Quality). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area ND065 (Oliver County, North Dakota).
What can I build on 5 acres in Oliver County?
Zoning in Oliver County is set by the county, the township or the city, depending on where the lot is (such as Center). 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, township or city zoning office has the district and its rules. See the Oliver County website.
What are the residential setbacks in Oliver County (2026)?
Setbacks in Oliver 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, township or city zoning office gives them for the district. See the Oliver County website.
Next to Oliver County: Burleigh County, McLean County, Mercer County, Morton County.
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