Search Nassau County, NY Property Records

Nassau County, NY, keeps property records at both the county and city/town/village levels. County records typically cover deeds, mortgages, land ownership, and tax assessments, while local governments maintain files related to zoning, building permits, and code enforcement.

Housing and economic indicators provide useful context when reviewing county property records. Current figures such as the median home value of $673,000.00, median rent of $2,220.00, median household income of $145,325.00, and median real estate tax of 1.49% help illustrate local market conditions and long-term trends.

Conducting property record searches in Nassau County depends on the type of record requested, the level of detail needed, and the time period involved.

Basic property details and more recent records are typically accessible through county-maintained online databases. The Official Records Search database allows users to locate deeds, mortgages, and liens, while the Land Records Viewer system provides assessment values, parcel data, and property tax information.

Although both systems allow free searches, fees apply for downloading documents or obtaining detailed reports. PropertyChecker offers subscription access with unlimited searches and comprehensive reports at flat rates. It provides a more cost-effective option for professionals than paying per document or page through county systems.

However, requests for older documents, extended ownership histories, or archived financial filings may require in-person visits to the appropriate records custodians, where microfilmed and indexed materials are stored. These offices may also accept requests submitted by mail or email, depending on the record type and availability.

To improve search efficiency, users should have reference details such as the property address, parcel section-block-lot (SBL) number, owner name, recording number, or a defined date range. Some online records may lack certification, and certain details may be redacted in accordance with privacy laws.

For additional information, the following sections describe the specific property record types available in Nassau County and explain how to access each.

Property Ownership and Title Information

Property ownership and title information in Nassau County are documented primarily through deeds, mortgages, liens, and recorded title transfers. The Nassau County Clerk is the official custodian of these records.

Individuals can access current and historical deeds, mortgages, and liens in person at the Clerk’s Office location or submit mail or email requests for certified copies. For online access, the County Clerk’s Official Records Search allows users to search for deeds, mortgages, and liens recorded by entering the owner’s name, document type, or recording date.

Property Sales and Transaction History

Property sales and transaction history in Nassau County are handled primarily by the Nassau County Department of Assessment. Serving as the county’s property appraiser’s authority, this department provides access to sale dates, sale prices, and prior transfer history linked to individual parcels.

The county’s Land Records Viewer serves as the primary resource for obtaining property sales data, where users may search by property address, SBL number, or owner name. Official documentation maintained by the County Clerk, like recorded deeds and conveyance filings, can also be requested, as they document property transactions.

In addition, PropertyChecker compiles publicly available transaction data sourced from different county offices. This consolidated report can serve as an additional reference point alongside official county systems for real estate sales data.

Property Tax Assessment and Payment Records

Property tax assessment and payment records in Nassau County are managed by the Nassau County Department of Assessment and the Nassau County Treasurer.

Assessment values, parcel classifications, historical assessment data, tax bills, payment status, and delinquency information are available through the county’s Land Records Viewer. To address outstanding tax balances, owners can use the Delinquent Tax Application.

For properties located within incorporated areas, individuals may also coordinate with the appropriate town or city Receiver of Taxes for local billing and payment details.

Meanwhile, assessment disputes are reviewed by the Nassau County Assessment Review Commission. Property owners must file appeals during the designated grievance period and submit supporting documentation in accordance with statutory deadlines and procedures.

Property Characteristics and Parcel Details

Conducting a property parcel search in Nassau County through the Land Records Viewer can give access to property characteristics and parcel details. By searching using property address, SBL number, or owner name, this tool can reveal the following:

• Parcel boundaries and tax map references

• Lot size and acreage

• Land use and property classification codes

• Improvement details

• Assessment class and taxable status

• Jurisdictional information tied to the parcel

Zoning, Land Use, and Planning Records

The Nassau County Economic Development Office and the Planning Commission are responsible for zoning, land use, and planning at the county level. It can provide access to subdivision maps, county planning approvals, and land use policies that may affect development applications.

Moreover, town, city, or village planning departments can provide zoning classifications, permitted uses, site plans, and variances of properties within their limits through their municipal websites or upon request in person, by mail, or by email.

Legal Documents Affecting Property

Legal documents affecting property in Nassau County, such as easements, covenants, judgments, and notices of pendency (lis pendens), are maintained by the Nassau County Clerk. These records establish ownership rights, secure loans, document financial claims, grant usage rights, and identify pending legal actions that may impact title or transferability.

Recorded documents can be accessed through the County Clerk’s Official Records Search, by visiting the Clerk’s Office in person, or by requesting them by mail. Note that the office does not provide property information by phone or by email.

Building Permits, Inspections, and Construction Records

Access to building permits, inspection files, and construction records in Nassau County is provided through local building departments, as these records are not centralized at the county level. Each city, town, and village maintains its own files related to construction approvals, inspections, certificates of occupancy, and code compliance.

Records may be reviewed in person or requested by email or mail, depending on the municipality. Some jurisdictions also provide online permit lookup tools.

Maps and Visual Property Data

The Nassau County LRV Viewer functions as an interactive mapping tool that supports over 407,000 parcels across the county. By selecting any parcel on the map, users are redirected to the Land Records Viewer system, where they can access parcel boundaries, land area, tax map references, assessment class, and jurisdictional information associated with the property.

The tool also incorporates aerial imagery and boundary overlays that allow users to confirm parcel dimensions and spatial relationships visually.

The Land Records Viewer system is the tool used for Nassau County parcel searches, giving the public access to a comprehensive set of property records maintained by the Department of Assessment.

Data available through the viewer includes assessment rolls, tax maps, property photographs, district information, tax rates, past taxes, exemptions, and comparable sales, all linked to the County's GIS.

Parcel lookups are performed using one of two methods. The SBL lookup accepts a combined address, SBL number, or landmark search, or alternatively breaks the search into separate Section, Block, and Lot fields. The address lookup uses house number, street name, town, and zip code, with the street name entered without directional prefixes or road type suffixes.

Completing the reCAPTCHA is required before any search runs, and account creation removes that requirement. The viewer contains property maps for every parcel in Nassau County and is provided as a public research service.

Displayed here are charts summarizing the county's tax rates, accompanied by insights into median home values, income figures, and rent rates.

Median Rent

$2,220.00

New York	$928.25
National	$840.25

• +139.2 %
  vs New York
• +164.2 %
  vs National

Median Home Value

$673,000.00

New York	$169,000.00
National	$173,750.00

• +298.2 %
  vs New York
• +287.3 %
  vs National

Median Household Income

$145,325.00

New York	$70,656.50
National	$65,108.00

• +105.7 %
  vs New York
• +123.2 %
  vs National

Median Property Tax Rate

1.49%

New York	2.11%
National	0.74%

• -29.4%
  vs New York
• +101.4 %
  vs National

Unemployment Rate

2.72%

New York	2.91%
National	2.87%

• -6.5 %
  vs New York
• -5.2 %
  vs National

Renter Occupied Housing

15.18%

New York	20.16%
National	21.81%

• -24.7 %
  vs New York
• -30.4 %
  vs National

The Nassau County Clerk serves as the registrar of deeds and is responsible for recording and maintaining land records dating back to the county’s formation in 1899.

Documents recorded with the County Clerk directly affect other property information maintained by county and local offices. Ownership transfers, mortgages, and liens recorded here are used by the Department of Assessment to update ownership and assessment records. They may also influence zoning, land use, and permitting decisions overseen by municipal planning and building departments.

The Official Records Search portal provides online access to records from February 22, 1994, to the present. For older records or requests for certified copies, individuals must visit the Clerk’s Office in Mineola or submit a FOIL request.

The County Clerk charges fees for copies and certifications. As specific copy fees are not listed on the online fee schedule, individuals must inquire in person or by phone for current rates.

Nassau County is made up of 69 incorporated municipalities, which include 2 cities, 3 towns, and 64 villages. While the county oversees the official recording of property records, municipal governments maintain records related to zoning, land use, and local administration.

Atlantic Beach (village)

Baxter Estates (village)

Bayville (village)

Bellerose (village)

Brookville (village)

Cedarhurst (village)

Centre Island (village)

Cove Neck (village)

East Hills (village)

East Rockaway (village)

East Williston (village)

Farmingdale (village)

Floral Park (village)

Flower Hill (village)

Freeport (village)

Garden City (village)

Glen Cove (city)

Great Neck (village)

Great Neck Estates (village)

Great Neck Plaza (village)

Hempstead (town)

Hempstead (village)

Hewlett Bay Park (village)

Hewlett Harbor (village)

Hewlett Neck (village)

Island Park (village)

Kensington (village)

Kings Point (village)

Lake Success (village)

Lattingtown (village)

Laurel Hollow (village)

Lawrence (village)

Long Beach (city)

Lynbrook (village)

Malverne (village)

Manorhaven (village)

Massapequa Park (village)

Matinecock (village)

Mill Neck (village)

Mineola (village)

Munsey Park (village)

Muttontown (village)

New Hyde Park (village)

North Hempstead (town)

North Hills (village)

Old Brookville (village)

Old Westbury (village)

Oyster Bay (town)

Oyster Bay Cove (village)

Plandome (village)

Plandome Heights (village)

Plandome Manor (village)

Port Washington North (village)

Rockville Centre (village)

Roslyn (village)

Roslyn Estates (village)

Roslyn Harbor (village)

Russell Gardens (village)

Saddle Rock (village)

Sands Point (village)

Sea Cliff (village)

South Floral Park (village)

Stewart Manor (village)

Thomaston (village)

Upper Brookville (village)

Valley Stream (village)

Westbury (village)

Williston Park (village)

Woodsburgh (village)