Search deeds, sales history, tax data, and permits across all Nassau County municipalities
Nassau County's real estate market is driven by proximity to Manhattan, strong public school districts, and established communities with distinct character. The county consistently ranks among the most expensive suburban markets in the nation, with median home prices well above national averages.
The North Shore — including Great Neck, Manhasset, Roslyn, and Oyster Bay — commands the highest prices, with waterfront estates and historic properties often exceeding several million dollars. Central Nassau communities like Garden City, Rockville Centre, and Floral Park offer classic suburban living with walkable downtowns and LIRR access. The South Shore communities of Merrick, Bellmore, and Massapequa provide more affordable options while maintaining beach access and strong community identity.
Long Beach, the county's barrier island city, has experienced significant revitalization since Hurricane Sandy, with new construction and rising property values. Investors should note that flood insurance requirements and coastal building regulations significantly impact property costs in South Shore and barrier island locations.
RegWatch aggregates Nassau County property data from multiple authoritative sources:
Nassau County uses a Section-Block-Lot (SBL) system to identify properties, distinct from NYC's Borough-Block-Lot. The "section" corresponds to a geographic area within the county's tax map system, with blocks and lots subdividing each section. A complete parcel identifier requires all three components.
Property assessments in Nassau County have been historically contentious. The county completed a comprehensive reassessment effective for the 2020/21 tax year — the first full reassessment in decades. This transition shifted many properties to market-value-based assessments, resulting in significant tax changes for homeowners throughout the county. The assessment roll is maintained by the Nassau County Department of Assessment.
Title searches in Nassau County involve examining records at the county clerk's office in Mineola. The clerk's USLandRecords portal provides online access to recorded documents from recent decades, though older records may require in-person research. RegWatch streamlines this process by cross-referencing clerk records with ORPTS sales data and statewide parcel information.
Nassau County's structure is unique — three towns encompass nearly all residential areas, with cities and villages providing additional governance layers:
Enter any Nassau County address in RegWatch's search bar. We'll return owner information, tax assessments, sales history, deed references, and available permit data — all from official county and state sources.
Nassau County identifies properties using a Section-Block-Lot system. The section is a geographic zone on the county tax map, the block is a subdivision within that section, and the lot identifies the specific parcel. You'll need all three components for a precise property lookup.
Yes. All property sales in Nassau County are recorded with the county clerk and reported to the NYS Office of Real Property Tax Services. RegWatch provides sale prices, buyer/seller names, deed book/page references, and sale dates.
The Nassau County Clerk's USLandRecords portal provides online access to recorded deeds, mortgages, and other instruments. RegWatch integrates this data directly into property reports for convenient access.
Nassau County completed a comprehensive property reassessment effective for the 2020/21 tax year, transitioning to market-value-based assessments for the first time in decades. This significantly changed tax obligations for many homeowners.
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