Scioto County, OH zoning map, flood zone and property lines by address
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Towns in Scioto County: Portsmouth, Wheelersburg, West Portsmouth.
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 Scioto County has 103 FIRM panels, the newest effective June 2020; 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 Scioto 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 Ohio statewide parcel layer (OGRIP, Ohio Department of Natural Resources, from each county auditor), so a Scioto lot shows the same lines the county auditor draws. Scioto County covers about 390,499 acres of land and 3,972 acres of water.
Mapped lines are approximate. The Scioto County auditor keeps the parcel record (Scioto County website); a licensed surveyor sets the true corners.
Zoning
In Ohio zoning is set by the county, the township or the city or village, depending on where the lot is: in Scioto County, Portsmouth 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 Scioto County website lists the county's municipalities.
ADU and guest houses
Under Ohio's zoning laws (Ohio Revised Code chapters 303, 519 and 713), the county, the township or the city or village, depending on where the lot is can allow an accessory dwelling unit on a lot with a house. Whether a Scioto 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. Scioto County is soil survey area OH145, Scioto County, Ohio, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Scioto County needs a permit from the Scioto County local health district under the Ohio sewage treatment system rules (Ohio Administrative Code 3701-29).
Setbacks
Setbacks in Scioto 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 Portsmouth for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Scioto lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Scioto 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 Scioto County has 103 panels, the newest effective June 2020. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Scioto County?
Open the Ohio map, type the address, and the parcel outline from the Scioto County auditor 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 Scioto County?
Zoning in Scioto County is set by the county, the township or the city or village, depending on where the lot is (such as Portsmouth). 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 Scioto County?
Under Ohio's zoning laws (Ohio Revised Code chapters 303, 519 and 713), the county, the township or the city or village, depending on where the lot is can allow an accessory dwelling unit, and each sets its own rules. In Scioto 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 Scioto County?
Yes. A new or changed septic system in Scioto County needs a permit from the Scioto County local health district under the Ohio sewage treatment system rules (Ohio Administrative Code 3701-29). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area OH145 (Scioto County, Ohio).
What can I build on 5 acres in Scioto County?
Zoning in Scioto County is set by the county, the township or the city or village, depending on where the lot is (such as Portsmouth). 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 Scioto County website.
What are the residential setbacks in Scioto County (2026)?
Setbacks in Scioto 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 Scioto County website.
Next to Scioto County: Adams County, Jackson County, Lawrence County, Pike County.
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