Belmont County, OH zoning map, flood zone and property lines by address
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Towns in Belmont County: Martins Ferry, Saint Clairsville, Bellaire.
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 Belmont County has 62 FIRM panels, the newest effective April 2006; 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 Belmont 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 Belmont lot shows the same lines the county auditor draws. Belmont County covers about 340,591 acres of land and 5,854 acres of water.
Mapped lines are approximate. The Belmont County auditor keeps the parcel record (Belmont 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 Belmont County, Martins Ferry, Bellaire each zone the land inside their 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 Belmont 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 Belmont 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. Belmont County is soil survey area OH013, Belmont County, Ohio, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Belmont County needs a permit from the Belmont County local health district under the Ohio sewage treatment system rules (Ohio Administrative Code 3701-29).
Setbacks
Setbacks in Belmont 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 Martins Ferry and Bellaire for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Belmont lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Belmont 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 Belmont County has 62 panels, the newest effective April 2006. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Belmont County?
Open the Ohio map, type the address, and the parcel outline from the Belmont 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 Belmont County?
Zoning in Belmont County is set by the county, the township or the city or village, depending on where the lot is (such as Martins Ferry, Bellaire). 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 Belmont 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 Belmont 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 Belmont County?
Yes. A new or changed septic system in Belmont County needs a permit from the Belmont 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 OH013 (Belmont County, Ohio).
What can I build on 5 acres in Belmont County?
Zoning in Belmont County is set by the county, the township or the city or village, depending on where the lot is (such as Martins Ferry, Bellaire). 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 Belmont County website.
What are the residential setbacks in Belmont County (2026)?
Setbacks in Belmont 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 Belmont County website.
Next to Belmont County: Guernsey County, Harrison County, Jefferson County, Monroe County, Noble County.
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