Jasper County, IL zoning map, flood zone and property lines by address
Free, no account. Or open the Illinois map and tap a lot.
Towns in Jasper County: Newton.
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 21 FIRM panels covering Jasper County, the newest effective July 2026; 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 a Jasper 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 Illinois county parcel layers (each county publishes its own), so a Jasper lot shows the same lines the county supervisor of assessments draws. Jasper County covers about 316,553 acres of land and 2,307 acres of water.
Mapped lines are approximate. The Jasper County supervisor of assessments keeps the parcel record (Jasper County website); a licensed surveyor sets the true corners.
Zoning
Jasper County zones its unincorporated land, and Newton zones the land inside its limits. ParcelSheet shows the use the county supervisor of assessments 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 Illinois's county zoning law (Counties Code, 55 ILCS 5/5-12001 and following), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Jasper 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. Jasper County is soil survey area IL079, Jasper County, Illinois, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Jasper County needs a permit from the Jasper County health department (Illinois Department of Public Health private sewage program; IDPH itself where the county has no health department).
Setbacks
Setbacks in Jasper 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 Newton for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Jasper lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Jasper County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA has 21 flood map panels covering Jasper County, the newest effective July 2026. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Jasper County?
Open the Illinois map, type the address, and the parcel outline from the Jasper County supervisor of assessments 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 Jasper County?
Zoning in Jasper County is set by the county for unincorporated land and by each city (such as Newton) inside its own limits. ParcelSheet shows the use code the county supervisor of assessments lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Jasper County?
Under Illinois's county zoning law (Counties Code, 55 ILCS 5/5-12001 and following), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Jasper 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 Jasper County?
Yes. A new or changed septic system in Jasper County needs a permit from the Jasper County health department (Illinois Department of Public Health private sewage program; IDPH itself where the county has no health department). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area IL079 (Jasper County, Illinois).
What can I build on 5 acres in Jasper County?
Zoning in Jasper County is set by the county for unincorporated land and each city inside its own limits (such as Newton). 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 Jasper County website.
What are the residential setbacks in Jasper County (2026)?
Setbacks in Jasper 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 Jasper County website.
Next to Jasper County: Clark County, Clay County, Crawford County, Cumberland County, Effingham County, Richland County.
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