Blog · October 14, 2026 · South Carolina
Union County Flood Zone Map (South Carolina)
Look up any Union County address on FEMA's flood map, read the zone, and match it to the parcel record for land around Jonesville.
Main page: Union County, SC GIS & Parcel Viewer (official map link, Union County facts and neighboring maps).
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A Union County flood zone map check belongs in the due diligence for any Union County property, from a house lot in Carlisle to farm ground near Jonesville. For any tract in Union County, South Carolina, the answer affects insurance, permits and resale.
The sections below go from the FEMA search to the Union County parcel record, then cover insurance, permits and map changes near Jonesville.
Look up the Union County flood zone map step by step
Start at the FEMA Flood Map Service Center and enter the property address in Jonesville or anywhere else in the county. If a tract around Carlisle has no street number yet, search the nearest road and pan to it. For an interactive view of Union County, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery, which lists how much of a Union County parcel sits inside the zone. Then open the Union County Beacon site for Union County to confirm the parcel near Jonesville. Laying the county parcel outline beside the FEMA shading lists if a homesite near Carlisle sits above or inside the zone.
Search Union County parcels by owner, address or ID
Union County publishes its parcels on the Union County Beacon site, which runs on Schneider Geospatial's Beacon platform, free to use for a lot in Lockhart or a tract around Jonesville. In the county version, the search page takes an owner, an address or a parcel ID, and each report links back to the map view for the tract around Lockhart. Bookmark our Union County page too; it tracks the official South Carolina link if it moves and lists the maps around Lockhart.
Zone A, AE and X in plain English
For a lot in Jonesville, the label matters more than the color: A and V zones are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). A surveyor working near Jonesville uses the base flood elevation printed for AE zones; unnumbered A zones don't have one. Land near Carlisle in shaded X (Zone B on older maps) is moderate risk, between the 1-percent and 0.2-percent annual chance lines. Clear, unshaded X near Jonesville is outside the 500-year floodplain.
Low ground and small streams around Jonesville
Small streams and ditches near Jonesville may not be studied in detail can still flood; FEMA says moderate- and low-risk areas still carry risk.
A short buyer checklist for Jonesville
Request any past flood claims history for a Union County property before closing; it tells you more than the map alone. An agent working in Union County can quote flood coverage once you know the zone for the lot near Lockhart.
Insurance, permits and map changes
Here's why the zone matters at a closing in Jonesville. Where a building in Jonesville is mapped in a high-risk zone and is financed by a regulated or federally insured lender, flood insurance is mandatory; that applies where the local government around Carlisle is in the National Flood Insurance Program. For a Union County home in shaded or unshaded X, insurance is a choice, not a mandate, although some lenders require it anyway. Where a structure near Jonesville looks higher than the shading suggests, a Letter of Map Amendment request is the formal route; a surveyor near Carlisle can supply the elevation data. Building or filling inside a mapped zone near Jonesville usually needs a floodplain permit; the county floodplain administrator can say what applies.
Union County flood zones questions
What if FEMA's map is wrong about my house near Lockhart?
For a lot in Carlisle, hire a surveyor for an elevation certificate, then file a LOMA request with FEMA.
Does a 100-year floodplain near Lockhart flood only once a century?
No; land near Lockhart in the 100-year floodplain has a 1-percent chance of flooding every year, and two floods in one decade near Carlisle are possible.
What does BFE mean on the flood map for Carlisle?
On the map covering Carlisle, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood, and a surveyor compares the building near Carlisle to it.
Is Zone AE near Lockhart high risk?
For a Union County parcel, Zone AE means a Special Flood Hazard Area with a 1-percent annual chance of flooding and a published base flood elevation.
Do I need a permit to build in the floodplain near Carlisle?
Often, but local floodplain rules apply; ask the county or town building office in Carlisle before you buy.
Who prepares an elevation certificate for a house in Carlisle?
Hire a professional surveyor or engineer who works in Union County; ask the local floodplain office first in case one exists.
Open the official Union County, SC parcel map Union County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.