Blog · October 14, 2026 · South Dakota
Reading the Aberdeen Flood Zone Map for a parcel
The zone on FEMA's map affects insurance, building and resale near Westport.
Main page: Brown County, SD GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Claremont? The Aberdeen flood zone map tells you whether it sits in a FEMA flood zone, and the lookup is free. In this Aberdeen guide: finding the address on FEMA's map, decoding A, AE and X, and pairing it with the Brown County Beacon site.
The Aberdeen flood zone map: start here
The official source is FEMA's Flood Map Service Center: search an address around Westport, and pick the FIRMette or map view. Vacant ground around Warner can still be found: zoom in from the nearest road and click the spot.
Getting to the right map
Your first stop is the Brown County Beacon site; it maps every assessed parcel in the county, Groton included. Without an address in hand, pan along the nearest road until the lines appear, then click inside the one you want, and that holds around Groton too. In and around Groton, write down the parcel ID while you have it open; each records desk in the county uses it to find the file.
City limits and county records
Aberdeen lies within Brown County, South Dakota, and the county assessor maps its lots. Aberdeen is also the county seat, so deeds and plats are filed in town. For a home near Claremont, city or town hall handles matters such as zoning, permits and utilities inside its limits, while the county keeps the tax map. Lots just outside the city limits near Stratford often follows county rules rather than the town's.
Offices that can help
If the acreage or value on a parcel near Claremont looks off belong with the Director of Equalization, which maintains the tax roll. Questions about what you can build around Warner are for the local planning and health departments, town or county, depending on location.
Zones on the Aberdeen flood zone map
For land near Columbia, any A or V zone are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any year. For a tract near Westport, minimal risk is not no risk: according to FEMA, many claims come from moderate- and low-risk areas.
Lining it up with the parcel map
FEMA's map shows zones but not ownership, so open the Brown County Beacon site next to see exactly which lot near Warner you're looking at.
Questions to ask before you buy
Request for any Elevation Certificate on the property near Columbia; getting a quote early keeps the budget honest.
Insurance, lenders and building
For a structure inside an A or V zone and a federally regulated lender is involved, flood insurance is generally required in communities in the NFIP, which applies near Groton as much as anywhere. Remodeling a house in a zone near Westport often needs a floodplain permit; check with the county or town building office early.
Legal descriptions in South Dakota
South Dakota uses the Public Land Survey System, which means a tract near Claremont is described by section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though corrections make some sections near Stratford odd-sized. Keep the legal description for land near Westport before you request a deed or survey.
Beyond the mapped zones
Small streams around Claremont aren't always studied in detail, so walk the land after rain. Wet ground around Stratford is a separate issue from flood zones; check the National Wetlands Inventory mapper for a first look.
Deeds, plats and who keeps them
For anything that matters, pull the recorded deed through the Register of Deeds; the parcel map near Westport only summarizes it. Inherited tracts near Groton may go back through several deeds, and a title company can sort it out if money is changing hands.
Land on the county line
Brown County meets Dickey County, ND, Sargent County, ND, Day County, Edmunds County, and Faulk County, and each of those keeps its own parcel map. Acreage along the edge near Westport may be split in two county records, so look at the adjacent map too. The Platbookmapper state page lists each bordering county map for South Dakota.
Taking the map into the field
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Westport, so load it before you lose signal. A printout of the tract near Claremont keeps working without signal.
Quick answers
Is AE a high-risk flood zone for land near Groton?
Both are high-risk zones, but only AE has a base flood elevation, so builders near Claremont design to that elevation.
Is Zone X safe from flooding in Aberdeen?
For most people, shaded X is moderate risk and unshaded X is minimal risk; many owners near Claremont buy coverage anyway.
Can I see flood zones on the Brown County Beacon site?
Good question; a flood layer may appear in the Brown County Beacon site layer list; confirm a lot near Groton on FEMA's map either way.
When is flood insurance required for land near Claremont?
For most people, for a building near Groton in an A or V zone with a federally backed or regulated mortgage, it's generally required; outside those zones it's your call.
How is land described in South Dakota deeds?
Closer to Warner, Deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
Open the official Brown County, SD parcel map See it 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.