Nassau County Property Viewer

Search for a Nassau County NY property viewer. A property viewer provides information on property maps, boundary lines, zoning boundaries, parcel divisions, parcel viewer, property appraisals, property assessments, property taxes, unpaid property taxes, tax liens, foreclosures, unclaimed parcels, property owner information, building permits, property research, deeds, titles, historical property taxes, property tax rates, and historical maps.


Assessor Offices in Nassau County NY calculate the value of all taxable property in their municipality by conducting property appraisals. They may also be responsible for determining the property taxes for each parcel. Assessor Offices maintain information on all properties, including property maps, boundary lines, zoning boundaries, and parcel divisions. This information is often available in a property viewer on the Assessor Office website. Nassau County property viewers may also provide information on appraisal values, zoning restrictions, and Nassau County property tax assessments. They can be used to locate unclaimed parcels, public property, and look up property owner information or parcel numbers in Nassau County.

Freeport Assessor Freeport NY 46 North Ocean Avenue 11520 516-377-2256

Nassau County Assessor's Office Mineola NY 240 Old Country Road 11501 516-571-1500


Historical Societies in Nassau County NY maintain documents and objects that have historical value, and this can include property records. Historical Societies may keep historic Nassau County property tax records, property sale documents like deeds and titles, or property maps from different eras. They may also provide property information in the form of a property viewer, which can show historic property boundaries, changes to municipal lines and zones, and ownership information. Nassau County property viewers can also show property appraisal values and property tax rates over time, and they are an useful tool for conducting research. Property viewers may be available online through the Historical Society website.

Baldwin Historical Society Baldwin NY 1980 Grand Avenue 11510 516-223-6900

Cow Neck Peninsula Historical Society Port Washington NY 336 Port Washington Boulevard 11050 516-365-9074

Floral Park Historical Society Floral Park NY 29 Tulip Avenue 11001 516-775-6849

Franklin Square Historical Society Franklin Square NY 970 Hempstead Turnpike 11010 516-352-1586

Freeport New York Historical Society Freeport NY 350 South Main Street 11520 516-623-9632

Levittown Historical Society Levittown NY 150 Abbey Lane 11756 516-434-7140

Long Beach New York Historical Society Long Beach NY 226 West Penn Street 11561 516-432-1192

Malverne Historical Society Malverne NY 369 Ocean Avenue 11565 516-887-9727

Massapequa Historical Society Massapequa NY 4755 Merrick Road 11758 516-799-2023

Matinecock Masonic Historical Society Oyster Bay NY 14 West Main Street 11771 516-802-7357

Mineola Historical Society Mineola NY 211 Westbury Avenue 11501 516-746-6722

North Hempstead Historical Society Manhasset NY 200 Plandome Road 11030 516-883-6320

Oyster Bay Historical Society Oyster Bay NY 20 Summit Street 11771 516-922-5032

Point Lookout Historical Society Point Lookout NY 23 Bellmore Avenue 11569 516-897-0324

Seaford New York Historical Society Seaford NY 3890 Waverly Avenue 11783 516-826-1150

The Garden City Historical Society Garden City NY 109 11th Street 11530 516-741-4145

The Westburys Historical Society Westbury NY 454 Rockland Street 11590 631-333-0176

Valley Stream Historical Society Valley Stream NY 143 Hendrickson Avenue 11580 516-872-4159


Treasurer and Tax Collector Offices in Nassau County NY collect property taxes for a local government and distribute these funds. They maintain several property records that may be available as part of Nassau County property viewers. A property viewer, also called a Nassau County property map, includes property tax assessments, real estate appraisal reports, boundary lines, and zoning boundaries. These viewers may also provide information on the current owners, parcel numbers, and unclaimed parcels. Nassau County property owners or potential buyers can use property viewers to locate information about paid and unpaid property taxes, tax liens, and foreclosures. Property viewers are typically available on the Treasurer and Tax Collector Office website.

Brookville Village Treasurer Glen Head NY 18 Horse Hill Road 11545 516-626-1792

Freeport Treasurer Freeport NY 46 North Ocean Avenue 11520 516-377-2261

Hempstead Village Treasurer Hempstead NY 99 Nichols Court 11550 516-489-3400

Nassau County Treasurer's Office Mineola NY 1 West Street 11501 516-571-2090


Archives in Nassau County NY preserve records that have historical significance for a local area, which can include property records. Some Archives may provide property information in the form of a property viewer, which can be used to look up historic Nassau County property boundaries, ownership information, and property divisions over time, as well as historical city and town maps. These Nassau County public property records may also list historical property tax rates or property value assessments and any changes to property maps over time, which make them valuable for conducting genealogical research. Archives may provide online access to their property viewers.

Cold Spring Harbor Laboratory Library and Archive Cold Spring Harbor NY 1 Bungtown Road 11724 516-367-6872

Valley Stream National Archive Valley Stream NY 200 East Merrick Road 11580 516-872-9700


Building Departments in Nassau County NY create and enforce codes and regulations to ensure the construction of safe buildings. As part of this responsibility, Building Departments may keep Nassau County property viewers, which display information about all the properties in the department's area. These property viewers may include information on parcel numbers, property tax assessments, building permits, and occupancy permits. They also show property zones, including the rules and regulations for each zone and zoning boundaries, making them useful resources for property owners or prospective buyers. Nassau County Building Department property viewers may be available online.

Freeport Building Department Freeport NY 46 North Ocean Avenue 11520 516-378-0700

Hempstead Building Department Hempstead NY 1 Washington Street 11550 516-538-8500

Hempstead Planning Department Hempstead NY 200 North Franklin Street 11550 516-538-7100

Hempstead Planning Department Roosevelt NY 383 Nassau Road 11575 516-378-2111

Lawrence Building Department Lawrence NY 196 Central Avenue 11559 516-239-3987

Manhasset Planning Department Manhasset NY 210 Plandome Road 11030 516-869-7752

Nassau County Planning Department Mineola NY 1 West Street 11501 516-571-4203

North Hempstead Building Department Manhasset NY 210 Plandome Road 11030 516-869-7680

North Hempstead Zoning Manhasset NY 210 Plandome Road 11030 516-869-7659

Oyster Bay Planning Department Oyster Bay NY 74 Audrey Avenue 11771 516-624-6200

Oyster Bay Zoning Oyster Bay NY 74 Audrey Avenue 11771 516-624-6232

Valley Stream Zoning Valley Stream NY 123 South Central Avenue 11580 516-825-8201


Recorders of Deeds in Nassau County NY maintain real estate ownership documents as part of their job to ensure the accuracy of property, land, and property tax records. They have records on every property in their municipality, and they may provide a property viewer to look up this information. Nassau County property viewers provide information on parcel boundaries, property owners, property divisions, and zoning boundaries. They can also show Nassau County parcel numbers, unclaimed parcels, and property tax information, including property tax assessments, unpaid property taxes, and tax liens or foreclosures. Recorders of Deeds may provide online access to a property viewer on their website.

Nassau County Recorder of Deeds Mineola NY 240 Old Country Road 11501 516-571-1444