Nassau County Property Assessor (New York)

Search for Nassau County, NY property assessment information. Property Assessments include property tax assessments, property valuations, property tax liens, defaults on property taxes, and property assessment appeals.


Nassau County Assessors determine the value of properties and parcels so that the jurisdiction can levy New York property taxes. The Assessor's Office maintains current data on every parcel in the district, including records on Nassau County property tax assessments, maps of property lines, and inventories of parcels and structures, as well as the value of all the property in the jurisdiction. Nassau County Tax Assessors may also keep records on reassessments for construction or improvements and other on-site inspections. Nassau County Assessment Offices provide online access to their property assessment records.

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


Nassau County Clerks file documents and preserve a range of municipal records in order to maintain an archive for their New York municipality. These Nassau County tax assessment records are open to the public. The Clerk's Office has a number of records on property assessments, including real estate excise taxes, tax liens on properties, and the Nassau County property tax assessment formulas. They also keep records on property transactions, deeds, and titles. Nassau County Clerks provide online access to their public property tax records, including documents related to property assessments.

Brookville Clerk East Norwich NY 104 Susan Cove 11732 516-922-8198

East Rockaway Clerk East Rockaway NY 376 Atlantic Avenue 11518 516-887-6312

Glen Cove Clerk Glen Cove NY 9 Glen Street 11542 516-676-2000

Hempstead Town Clerk Hempstead NY 1 Washington Street 11550 516-489-5000

Kensington Village Clerk Great Neck NY 2 Nassau Drive 11021 516-482-4409

Malverne Clerk Malverne NY 99 Church Street 11565 516-599-0722

Matinecock Village Clerk Locust Valley NY 63 Midway Avenue 11560 516-671-7790

Nassau County Clerk Mineola NY 1550 Franklin Avenue 11501 516-571-4010

Nassau County Clerk Westbury NY 1200 Old Country Road 11590 516-493-3900

New Hyde Park Clerk New Hyde Park NY 1420 Jericho Turnpike 11040 516-354-0022

North Hempstead Town Clerk Manhasset NY 200 Plandome Road 11030 516-869-7650

North Hills Clerk Roslyn NY 1 Shelter Rock Road 11576 516-365-8857

Old Westbury Village Clerk Old Westbury NY 1 Store Hill Road 11568 516-626-0800

Oyster Bay Town Clerk Massapequa NY 977 Hicksville Road 11758 516-797-7960

Oyster Bay Town Clerk Oyster Bay NY 54 Audrey Avenue 11771 516-624-6320

Plandome Village Clerk Manhasset NY 65 South Drive 11030 516-627-1748

Valley Stream Clerk Valley Stream NY 123 South Central Avenue 11580 516-825-4200

Westbury Village Clerk Westbury NY 235 Lincoln Place 11590 516-334-1700


Nassau County Recorders of Deeds collect public records, primarily documents related to property, and make them available to the New York public. The Office of the Recorder of Deeds maintains records on Nassau County property tax assessments, including property and parcel surveys, property tax liens, and property valuations. They also record land transactions within the jurisdiction, including deeds, mortgages, and easements. The Nassau County Recorder provides online databases for public records access of property assessments.

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


Nassau County Town Halls and City Halls are the chief administrative office that runs a town or city in New York. The Town or City Hall maintains records related to the locality, including property assessment records. These Nassau County public assessment records include property value assessments, records of paid and unpaid property taxes, and property tax liens. Town and City Halls also maintain records on land transactions, property sales and transfers, and municipal and zoning boundaries. Property assessment records are available as public records, and many Town and City Halls provide online access to these files.

Glen Cove City Hall Glen Cove NY 9 Glen Street 11542 516-676-2000

Hempstead Town Hall Hempstead NY 350 Front Street 11550 516-489-5000

Levittown Town Hall Hicksville NY 201 Levittown Parkway 11801 516-933-6400

Long Beach City Hall Long Beach NY 1 West Chester Street 11561 516-431-1000

North Hempstead Town Hall Manhasset NY 220 Plandome Road 11030 516-869-6311

Oyster Bay Town Hall Massapequa NY 977 Hicksville Road 11758 516-797-7900

Oyster Bay Town Hall Oyster Bay NY 74 Audrey Avenue 11771 516-624-6333


Nassau County Treasurers and Tax Collectors are responsible for the collection of property tax revenue in New York. The Office of the Treasurer and Tax Collector maintains current data on every Nassau County parcel , as well as a number of other property tax assessment records. These records include property assessments, defaults on property taxes, lists of sold parcels, and property valuations. The Treasurer and Tax Collector may also maintain information on Nassau County property auctions and a property's prior liens or foreclosures. Nassau County Treasurers and Tax Collectors provide online databases to access property assessment records.

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