Westchester County GIS Data (New York)

An Assessor Office is responsible for appraising the taxable property in an area in order to calculate property taxes in Westchester County, New York. As part of this job, Westchester County Assessors maintain detailed county and local maps, including Geographic Information Science (GIS) data. These Westchester County GIS maps typically include property divisions, plots, buildings, property appraisal values, and property taxes. They may also include public property, parks, roads, place names, bodies of water, and other local geographical information, as well as flood zones, county zone lines, and school boundaries. These maps can be useful for a number of reasons, including buying and selling property. Assessors may provide online access to their Westchester County GIS data on their websites.

Bedford Assessor Bedford Hills NY 321 Bedford Road 10507 914-666-5149

Cortlandt Assessor Cortlandt NY 1 Heady Street 10567 914-734-1040

Harrison Town Assessor Harrison NY 1 Heineman Place 10528 914-670-3040

Lewisboro Town Assessors South Salem NY 99 Elmwood Road 10590 914-763-5592

Mount Vernon Assessor Mount Vernon NY 1 Roosevelt Square North, Ste 1 10550 914-665-2325

North Salem Town Assessor North Salem NY 270 Titicus Road 10560 914-669-5214

Ossining Assessor Ossining NY 16 Croton Avenue 10562 914-762-8274


A Building Department creates and enforces building codes and zoning regulations in order to ensure the construction of safe buildings in Westchester County, New York. As part of that job, Building Departments maintain GIS data that can include Westchester County GIS maps on the topography, elevation, soil composition, and flood zones for the local area. This information can be important for adhering to building codes and meeting zoning rules. These GIS maps may also show Westchester County parcels, lots, subdivisions, and tracts of land, as well as sewers, public utilities, and other building hazards. GIS data may be available on the Building Department website.

Ardsley Building Department Ardsley NY 507 Ashford Avenue 10502 914-693-6961

Armonk Building Department Armonk NY 17 Bedford Road 10504 914-273-8625

Bedford Planning Department Bedford Hills NY 425 Cherry Street 10507 914-666-4434

Bedford Zoning Bedford Hills NY 425 Cherry Street 10507 914-666-4585

Bronxville Building Department Bronxville NY 200 Pondfield Road 10708 914-337-7338

Croton On Hudson Permits Croton-on-Hudson NY 1 Van Wyck St 10520 914-271-4781

Eastchester Building Department Eastchester NY 40 Mill Road, Rm 206 10709 914-771-3317

Greenburgh Building Department White Plains NY 177 Hillside Avenue 10607 914-993-1575

Harrison Zoning Harrison NY 1 Heineman Place 10528 914-670-3075

Hastings-On-Hudson Village Zoning Hastings-on-Hudson NY 7 Maple Avenue 10706 914-478-3402

Lewisboro Building Department South Salem NY 99 Elmwood Road 10590 914-763-3060

Lewisboro Planning Department South Salem NY 99 Elmwood Road 10590 914-763-5592

Lewisboro Town Zoning South Salem NY 99 Elmwood Road 10590 914-763-3822

Mamaroneck Building Department Mamaroneck NY 169 Mount Pleasant Avenue 10543 914-777-7731

Mt Vernon Zoning Mount Vernon NY 1 Roosevelt Square North 10550 914-665-2393

New Rochelle City Permits New Rochelle NY 515 North Avenue 10801 914-654-2140

New Rochelle Zoning New Rochelle NY 515 North Avenue 10801 914-654-2033

North Castle Building Department Armonk NY 17 Bedford Road, Ste 1 10504 914-273-3714

North Salem Planning Department North Salem NY 270 Titicus Road 10560 914-669-5661

North Salem Zoning North Salem NY 270 Titicus Road 10560 914-669-5952

Ossining Planning Department Ossining NY 101 U.s. 9 10562 914-762-8675

Ossining Village Building Department Ossining NY 2 U.s. 9, # 2 10562 914-941-3199

A Clerk Office maintains public records for a county or local government, including GIS data in the form of maps. These GIS maps provide detailed information such as property boundaries, roads, public property, parks, and in some cases, population and demographic information. GIS data can also show Westchester County property value assessments, property taxes, flood zones, zoning boundaries, and earthquake zones, as well as place names, bodies of water, and other geographic information. Clerks may also have historic GIS maps from the USGS or other organizations. Westchester County GIS data is often accessible through the Clerk Office website.

Bedford Town Clerk Bedford Hills NY 321 Bedford Road 10507 914-666-4534

Briarcliff Manor Village Clerk Briarcliff Manor NY 1111 Pleasantville Road 10510 914-941-4802

Cortland Town Clerk Cortlandt NY 1 Heady Street 10567 914-734-1020

Dobbs Ferry Village Clerk Dobbs Ferry NY 112 Main Street 10522 914-693-6161

Eastchester Town Clerk Eastchester NY 40 Mill Road, Rm 103 10709 914-771-3351

Greenburgh Town Clerk White Plains NY 320 Tarrytown Road 10607 914-993-1500

Harrison Clerk Harrison NY 1 Heineman Place 10528 914-670-3010

Hastings-On-Hudson Village Clerk Hastings-on-Hudson NY 7 Maple Avenue 10706 914-478-3400

Larchmont Village Clerk Larchmont NY 120 Larchmont Avenue, Ste 1 10538 914-834-6230

Lewisboro Town Clerk South Salem NY 11 Main St 10590 914-763-3511

Mt Pleasant Town Clerk Valhalla NY 1 Town Hall Plaza 10595 914-769-1766

Mt Vernon City Clerk Mount Vernon NY 1 Roosevelt Square North, Ste 1 10550 914-665-2348


A Town or City Hall provides municipal services for their town or city, including keeping vital records and maintaining documents on their jurisdiction such as maps with GIS data in Westchester County, New York. These GIS maps typically include property boundaries, real estate appraisal values, Westchester County property tax assessments, public property, and unclaimed parcels. The maps may also show place names, Westchester County zoning boundaries, bodies of water, and flood zones, as well as population and demographic information. Some Town and City Halls also maintain historical maps of their area. These maps are often available on the Town or City Hall website.

Cortlandt Manor Town Hall Cortlandt NY 1 Heady Street 10567 914-734-1046

Greenburgh Town Hall White Plains NY 177 Hillside Avenue 10607 914-993-1546

Harrison Town Hall Harrison NY 1 Heineman Place 10528 914-670-3005

Irvington Town Hall Irvington NY 85 Main Street 10533 914-591-6602

Mt Vernon City Hall Mount Vernon NY 1 Roosevelt Square North, Ste 2 10550 914-665-2300

New Castle Town Hall Chappaqua NY 200 South Greeley Avenue 10514 914-238-4771

New Rochelle City Hall New Rochelle NY 515 North Avenue 10801 914-654-2000

North Castle Town Hall Armonk NY 15 Bedford Road 10504 914-273-3321

North Salem Town Hall North Salem NY 266 Titicus Road 10560 914-669-5577