Alachua County, FL: flood zone, zoning and property lines by address
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Towns in Alachua County: Gainesville, Alachua, High Springs.
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 Alachua County has 112 FIRM panels, the newest effective September 2021; 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 an Alachua house comes from a licensed surveyor and is often on file with the county or city building office (Building Department & Contractor Licensing).
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 Alachua lot shows the same lines the property appraiser draws. Alachua County covers about 560,430 acres of land and 59,604 acres of water.
Mapped lines are approximate. The Alachua County Property Appraiser keeps the parcel record; a licensed surveyor sets the true corners.
An example from the county's own records: parcel 09005-010-001 in Gainesville, a lot with one house, about 6,098 square feet as mapped, the house built in 1982. Open it to see every card ParcelSheet draws for an Alachua lot.
Zoning
Alachua County zones its unincorporated land, and Gainesville, Alachua, High Springs each zone the land inside their limits. ParcelSheet shows the use the property appraiser lists for the lot and links Growth Management 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 Alachua lot can add one depends on its district; Growth Management 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. Alachua County is soil survey area FL001, Alachua County, Florida, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Alachua County needs a permit from the Florida Department of Health in Alachua County, which tests the soil on the lot itself.
Setbacks
Setbacks in Alachua County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; Growth Management gives them for the lot's district, and Gainesville, Alachua, High Springs for land inside their limits.
Hazards that apply
- Sinkholes. The Florida Geological Survey lists 82 subsidence incident reports in Alachua County (the reports). They are reports, not confirmed sinkholes; ParcelSheet does not rate a lot for sinkholes.
- Wind. The Florida Building Code sets the design wind speed for a house in Alachua County; the building office (Building Department & Contractor Licensing) applies it at permit.
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near an Alachua lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Alachua 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 Alachua County has 112 panels, the newest effective September 2021. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Alachua 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 Alachua 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 Alachua County?
Zoning in Alachua County is set by the county for unincorporated land and by each city (such as Gainesville, Alachua) 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 Alachua County?
Florida Statute 163.31771 lets counties and cities allow an accessory dwelling unit, and each sets its own rules. In Alachua 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 Alachua County?
Yes. A new or changed septic system in Alachua County needs a permit from the Florida Department of Health in Alachua County. ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area FL001 (Alachua County, Florida).
Next to Alachua County: Bradford County, Columbia County, Gilchrist County, Levy County, Marion County, Putnam County, Union County.
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