Calhoun County, FL: flood zone, zoning and property lines by address
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Towns in Calhoun County: Blountstown.
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 Calhoun County has 62 FIRM panels, the newest effective November 2025; 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 Calhoun 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 Florida statewide cadastral (county property appraiser parcels with the Department of Revenue tax roll), so a Calhoun lot shows the same lines the property appraiser draws. Calhoun County covers about 363,095 acres of land and 4,465 acres of water.
Mapped lines are approximate. The Calhoun County Property Appraiser keeps the parcel record; a licensed surveyor sets the true corners.
An example from the county's own records: parcel 331N08120000050802 in Blountstown, a lot with one house, about 2,748 square feet as mapped, the house built in 1920. Open it to see every card ParcelSheet draws for a Calhoun lot.
Zoning
Calhoun County zones its unincorporated land, and Blountstown zones the land inside its limits. ParcelSheet shows the use the property appraiser lists for the lot and links the county planning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Florida Statute 163.31771 lets local governments allow an accessory dwelling unit on a lot with a house. Whether a Calhoun lot can add one depends on its district; the county planning 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. Calhoun County is soil survey area FL013, Calhoun County, Florida, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Calhoun County needs a permit from the Florida Department of Health in Calhoun County, which tests the soil on the lot itself.
Setbacks
Setbacks in Calhoun 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 Blountstown for land inside its limits.
Hazards that apply
- Wind. The Florida Building Code sets the design wind speed for a house in Calhoun County; the building office applies it at permit.
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Calhoun lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Calhoun 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 Calhoun County has 62 panels, the newest effective November 2025. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Calhoun County?
Open the Florida map, type the address, and the parcel outline from the county property appraiser shows on the map with its parcel number and mapped size. The Calhoun County property appraiser keeps the official record. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Calhoun County?
Zoning in Calhoun County is set by the county for unincorporated land and by each city (such as Blountstown) inside its own limits. ParcelSheet shows the use code the property appraiser lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Calhoun County?
Florida Statute 163.31771 lets counties and cities allow an accessory dwelling unit, and each sets its own rules. In Calhoun 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 Calhoun County?
Yes. A new or changed septic system in Calhoun County needs a permit from the Florida Department of Health in Calhoun County. ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area FL013 (Calhoun County, Florida).
Next to Calhoun County: Bay County, Gadsden County, Gulf County, Jackson County, Liberty County.
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