Blog · October 14, 2026 · New York
Westchester County Flood Zone Map: checking a property's flood zone
The zone on FEMA's map affects insurance, building and resale near Eastchester.
Main page: Westchester County, NY GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Before an offer near Harrison, look at the Westchester County flood zone map: the zone on that map shapes insurance, permits and resale. This county guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the county ArcGIS parcel map, especially near Eastchester.
Getting started with the Westchester County flood zone map
In and around Greenburgh, start with FEMA's Flood Map Service Center: enter the street address, and choose the dynamic map. A tract near Greenburgh without an address can still be found: pan from the closest town and click the spot.
Getting to the right map
The official parcel map for this area is the Westchester County ArcGIS parcel map, and it opens in a browser with no account. For a home near Greenburgh, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. If you're looking near White Plains, write down the parcel ID from that panel; every office in the county will want it.
Water near Greenburgh
Low-lying fields near Harrison may not have detailed mapping, so look for water marks and debris lines. Wetlands near White Plains can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
Reading A, AE and X
With a lot near Bedford, any A or V zone mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. For property near Greenburgh, shaded Zone X marks moderate flood hazard, roughly the 100- to 500-year range; plain X, or C on older maps, means minimal mapped risk.
Using it on a phone
Most viewers work in a phone browser, which helps when you're standing on land near Eastchester, but coverage can be spotty out of town. A screenshot of the parcel near Lewisboro with its ID is a good backup.
A word on accuracy
For acreage around Lewisboro, acreage on the record is an estimate; just a licensed surveyor establishes the real corners on the ground. For acreage around Harrison, records update in batches, so a deed recorded last month can take weeks to appear.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so open the Westchester County ArcGIS parcel map next to see exactly which lot near Eastchester you're looking at.
Questions to ask before you buy
For a home near Lewisboro, request for any Elevation Certificate before closing; an insurance quote early avoids surprises.
Places you'll see on the map
White Plains is the county seat, which is where the courthouse records live. Smaller places on the map include Bedford, Cortlandt, Eastchester, and Greenburgh, each with its own cluster of lots. About 990,817 people live in Westchester County (Census Bureau estimate, 2023) on roughly 431 square miles.
Lenders and permits
If a building sits in a Special Flood Hazard Area and a federally regulated lender is involved, flood insurance is generally required in communities in the NFIP, whether the land is near Bedford or elsewhere in the county. New construction in a floodplain near Cortlandt often needs a floodplain permit; call the permitting office before you plan.
Sections, lots and bearings
Older tracts around Bedford commonly use metes-and-bounds descriptions, a series of courses and distances from a starting point. Platted lots around Greenburgh usually use lot and block from a recorded plat instead, making them easier to find. Copy the legal description from the record for the parcel near Harrison before you request a deed or survey.
Land on the county line
Westchester County touches Fairfield County, CT, Bergen County, NJ, Bronx County, Nassau County, and Putnam County, and each of those keeps its own parcel map. Acreage along the edge near Greenburgh can show up in two county records, so look at the adjacent map too. If you're looking near Harrison, our state page links every bordering county map across New York.
Who handles what
If the acreage or value on a parcel near Lewisboro looks off go to the county Real Property Tax Services office, which maintains the tax roll. Questions about what you can build around Harrison are for the local planning and health departments, and the answer depends on jurisdiction.
Recorded documents worth pulling
For property near Bedford, the map is an index, not the title: recorded deeds, plats and easements for parcels in the county sit with the County Clerk. For a home near Bedford, bring the document number from the tax record and the lookup takes minutes.
Questions about the Westchester County flood zone map
Can I see flood zones on the Westchester County ArcGIS parcel map?
Good question; some county viewers include a FEMA flood layer; confirm a lot near Bedford on FEMA's map either way.
Is AE a high-risk flood zone around Bedford?
An AE zone has a 1% annual chance of flooding and a base flood elevation, which shapes building rules near Greenburgh.
How do I get a property removed from a flood zone for land near Bedford?
Out toward Bedford, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground; it starts with an elevation survey.
When is flood insurance required in Westchester County?
For land near Lewisboro, it's typically required only for structures in high-risk zones with federally backed loans, in communities that take part in the NFIP.
Can I print the parcel map for land near White Plains?
Most viewers have a print or export tool; include the record panel for the lot near Eastchester.
Open the official Westchester County, NY 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.