Indian River County, FL: flood zone, zoning and property lines by address
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Towns in Indian River County: Sebastian, Vero Beach South, Florida Ridge.
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 Indian River County has 76 FIRM panels, the newest effective January 2023; coastal V zones, where waves add to the flood, are mapped along its shore.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for an Indian River house comes from a licensed surveyor and is often on file with the county or city building office (Building).
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 an Indian River lot shows the same lines the property appraiser draws. Indian River County covers about 321,635 acres of land and 73,006 acres of water.
Mapped lines are approximate. The Indian River County Property Appraiser keeps the parcel record; a licensed surveyor sets the true corners.
An example from the county's own records: parcel 31382400001198000020.0 in Sebastian, a lot with one house, about 19,166 square feet as mapped, the house built in 1986. Open it to see every card ParcelSheet draws for an Indian River lot.
Zoning
Indian River County zones its unincorporated land, and Sebastian zones the land inside its limits. ParcelSheet shows the use the property appraiser lists for the lot and links Planning 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 an Indian River lot can add one depends on its district; Planning 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. Indian River County is soil survey area FL061, Indian River County, Florida, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Indian River County needs a permit from the Florida Department of Health in Indian River County, which tests the soil on the lot itself.
Setbacks
Setbacks in Indian River County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; Planning gives them for the lot's district, and Sebastian for land inside its limits. On the Indian River shore, building seaward of the state's Coastal Construction Control Line needs a state permit.
Hazards that apply
- Sinkholes. The Florida Geological Survey lists 6 subsidence incident reports in Indian River County (the reports). They are reports, not confirmed sinkholes; ParcelSheet does not rate a lot for sinkholes.
- Storm surge. Indian River County has coastal V zones on its FEMA map, so storm surge reaches its shore. The county's evacuation zones are on its emergency management site; ParcelSheet shows the FEMA zone and the 3 ft sea level rise map at the lot.
- Wind. The Florida Building Code sets the design wind speed for a house in Indian River County; the building office (Building) applies it at permit.
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Indian River lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Indian River 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 Indian River County has 76 panels, the newest effective January 2023. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Indian River 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 Indian River 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 Indian River County?
Zoning in Indian River County is set by the county for unincorporated land and by each city (such as Sebastian) 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 Indian River County?
Florida Statute 163.31771 lets counties and cities allow an accessory dwelling unit, and each sets its own rules. In Indian River 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 Indian River County?
Yes. A new or changed septic system in Indian River County needs a permit from the Florida Department of Health in Indian River County. ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area FL061 (Indian River County, Florida).
Next to Indian River County: Brevard County, Okeechobee County, Osceola County, St. Lucie County.
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