Adair County, IA zoning map, flood zone and property lines by address
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Towns in Adair County: Greenfield.
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 Adair County has 38 FIRM panels, the newest effective April 2017; 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 Adair 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 Iowa county parcel layers (each county publishes its own), so an Adair lot shows the same lines the county assessor draws. Adair County covers about 364,333 acres of land and 642 acres of water.
Mapped lines are approximate. The Adair County assessor keeps the parcel record (Adair County website); a licensed surveyor sets the true corners.
Zoning
Adair County zones its unincorporated land, and Greenfield zones the land inside its limits. ParcelSheet shows the use the county assessor lists for the lot and links the county zoning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Iowa's county zoning law (Iowa Code Chapter 335), local governments can allow an accessory dwelling unit on a lot with a house. Whether an Adair lot can add one depends on its district; the county 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. Adair County is soil survey area IA001, Adair County, Iowa, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Adair County needs a permit from the Adair County environmental health department (county board of health, under Iowa Department of Natural Resources rules).
Setbacks
Setbacks in Adair County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county zoning office gives them for the lot's district, and Greenfield for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Adair lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Adair 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 Adair County has 38 panels, the newest effective April 2017. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Adair County?
Open the Iowa map, type the address, and the parcel outline from the Adair County assessor 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 Adair County?
Zoning in Adair County is set by the county for unincorporated land and by each city (such as Greenfield) inside its own limits. ParcelSheet shows the use code the county assessor lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Adair County?
Under Iowa's county zoning law (Iowa Code Chapter 335), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Adair County ask the 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 Adair County?
Yes. A new or changed septic system in Adair County needs a permit from the Adair County environmental health department (county board of health, under Iowa Department of Natural Resources rules). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area IA001 (Adair County, Iowa).
What can I build on 5 acres in Adair County?
Zoning in Adair County is set by the county for unincorporated land and each city inside its own limits (such as Greenfield). 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 planning office has the district and its rules. See the Adair County website.
What are the residential setbacks in Adair County (2026)?
Setbacks in Adair County come from the zoning code of the county, or of the city when the lot is inside city limits: 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 zoning office gives them for the district. See the Adair County website.
Next to Adair County: Adams County, Cass County, Guthrie County, Madison County, Union County.
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