Adams County, ID zoning map, flood zone and property lines by address
Free, no account. Or open the Idaho map and tap a lot.
Towns in Adams County: Council.
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 20 FIRM panels covering Adams County, the newest effective August 2021; 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 Adams 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 State of Idaho public parcels, from counties that share them, so an Adams lot shows the same lines the county assessor draws. Adams County covers about 872,194 acres of land and 4,290 acres of water.
Mapped lines are approximate. The Adams County assessor keeps the parcel record (Adams County website); a licensed surveyor sets the true corners.
Zoning
Adams County zones its unincorporated land, and Council zones the land inside its limits. ParcelSheet shows the use the county assessor lists for the lot and links the county planning and zoning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Idaho's Local Land Use Planning Act (Idaho Code Title 67, Chapter 65), local governments can allow an accessory dwelling unit on a lot with a house. Whether an Adams lot can add one depends on its district; the county planning and zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Setbacks
Setbacks in Adams 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 Council for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Adams lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Adams County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA has 20 flood map panels covering Adams County, the newest effective August 2021. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Adams County?
Open the Idaho map, type the address, and the parcel outline from the Adams 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 Adams County?
Zoning in Adams County is set by the county for unincorporated land and by each city (such as Council) 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 Adams County?
Under Idaho's Local Land Use Planning Act (Idaho Code Title 67, Chapter 65), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Adams 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.
What can I build on 5 acres in Adams County?
Zoning in Adams County is set by the county for unincorporated land and each city inside its own limits (such as Council). 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 Adams County website.
What are the residential setbacks in Adams County (2026)?
Setbacks in Adams 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 Adams County website.
Next to Adams County: Gem County, Idaho County, Valley County, Washington County.
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