Blog · October 14, 2026 · New York
The Westchester County Plat Book: a New York guide
What a Westchester County plat book is, where to find one around White Plains, and the free map that covers the gaps.
Main page: Westchester County, NY GIS & Parcel Viewer (official map link, Westchester County facts and neighboring maps).
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The printed Westchester County plat book and the online parcel map answer the same question, who owns the land near Eastchester, in different ways. Below is how to track one down for Westchester County, NY, and what the online map does better.
How to use the Westchester County plat book
Think of the Westchester County plat book as a bound, printed version of ownership: township pages, owner names on each tract, and road maps for places like Bedford. Don't confuse it with a subdivision plat on file for lots in Bedford; that recorded plat is a legal document, while the atlas is a reference.
Search Westchester County parcels by owner, address or ID
For land around Cortlandt, open the Westchester County ArcGIS parcel map (an Esri ArcGIS web map); it is the map Westchester County itself publishes. Click any Westchester County parcel near Eastchester to open its record: owner, parcel ID and assessed acreage are typically listed. For a backup route to the map covering Cortlandt, our Westchester County directory entry keeps the link current.
Current and older editions
Private publishers have printed plat books for many rural counties, but editions for Westchester County come and go; ask at the courthouse, the extension office or a farm supply store in White Plains. An old atlas can help trace when a tract around Bedford split off from a larger farm.
What a plat book page shows near Bedford
Plat book pages for Westchester County typically include an index of owners, so you can find a family name near Greenburgh without knowing the township. Acreage printed in a county atlas is approximate; the deed and a licensed survey decide the real figure for a tract around Greenburgh. For a land purchase near Greenburgh, rely on the county parcel record and a title search, not an atlas.
Old atlases and family history in Westchester County
Names in an older Westchester County atlas can lead you to the right deed in the grantor-grantee index for land near Harrison. Some buyers print the county parcel map at township scale to carry on back roads near Harrison.
Work and land use in Westchester County
County Business Patterns counted 31,152 business establishments in Westchester County for 2022, led by professional and technical services, construction, and health care and social assistance.
Towns and land across Westchester County
Town lots cluster around White Plains, the county seat, and Bedford, Cortlandt, Eastchester, and Greenburgh. Census Bureau estimates put Westchester County at about 990,817 residents in 2023 on approximately 431 square miles of land. Much of Westchester County is built out, so most clicks near Bedford land on platted lots.
Near the Westchester County line
Near the edge of the county, check the next map over: Fairfield County, CT, Bergen County, NJ, Bronx County, Nassau County, and Putnam County all border it. Our New York page links each map neighboring Westchester County.
Where Westchester County land records are kept
Deeds and plats behind the Westchester County map are kept by the county's recording office; the official Westchester County website names which office that is. A deed book and page or instrument number on the county record is the quickest route to pull the document for a lot in Lewisboro.
Using the Westchester County map as a modern plat book
Between editions, use the Westchester County ArcGIS parcel map; it shows owners, acreage and parcel IDs for land near Bedford at no cost. Print a screenshot of the tracts around White Plains if you want a paper copy in the truck.
Quick answers for Westchester County
Can I buy a new plat book for Westchester County, New York?
It depends on if a publisher has a county edition in print; local offices in Harrison typically know.
Is a plat book the same as a recorded plat for a lot in Harrison?
No; a lot in Harrison answers to its recorded plat, and the county atlas is a reference, nothing more.
Where can I find old plat books for Westchester County, New York?
Some libraries and historical societies keep older Westchester County atlases; ask what's available near Bedford.
Is the Westchester County, New York online map better than a plat book?
The Westchester County map is more current, while an atlas is handy offline near Harrison.
Does a Westchester County plat book show property lines?
It shows approximate ownership blocks; for lines near Harrison, use recorded plats and surveys.
Open the official Westchester County, NY parcel map Westchester 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.