The Suffolk County GIS Viewer holds data pertaining to transportation, elevation, jurisdiction, health & safety, infrastructure, environment, reference, records and land use. Use this viewer to search by address or tax parcel.

This GIS dataset was prepared by the Suffolk County Department of Economic Development and Planning for the Suffolk County Department of Health Services as part of the Suffolk County Subwatersheds Wastewater Plan titled Suffolk County Management Program for the Reduction of Nitrogen Loading from Wastewater Sources. The Department of Economic Development & Planning was asked to provide “parcel-specific buildout land use” for all of Suffolk County. In order to provide parcel-specific buildout land use, the land use for each and every distinct tax map parcel in the Suffolk County Real Property Tax Service Agency Tax Map Album had to be checked and updated. Following this task, parcel-specific land available for residential development was determined, and then residential buildout was calculated.

Tax Parcel Features and attributes for Suffolk County, NY. Data includes, Parcel ID, DSBL, Acreage, Status, etc.

Publication Date: April 2025. This polygon layer is updated annually.

This layer contains 2024 parcel data only for NY State counties which gave NYS ITs Geospatatial Services permission to share this data with the public. Work to obtain parcel data from additional counties, as well as permission to share the data, is ongoing. To date, 36 counties have provided the Geospatial Services permission to share their parcel data with the public. Parcel data for counties which do not allow the Geospatial Services to redistribute their data must be obtained directly from those counties. Geospatial Services' goal is to eventually include parcel data for all counties in New York State.

Parcel geometry was incorporated as received from County Real Property Departments. No attempt was made to edge-match parcels along adjacent counties. County attribute values were populated using 2024 Assessment Roll tabular data Geospatial Services obtained from the NYS Department of Tax and Finance’s Office of Real Property Tax Services (ORPTS). Tabular assessment data was joined to the county provided parcel geometry using the SWIS & SBL or SWIS & PRINT KEY unique identifier for each parcel.

Detailed information about assessment attributes can be found in the ORPTS Assessor’s Manuals available here: https://www.tax.ny.gov/research/property/assess/manuals/assersmanual.htm. New York City data comes from NYC MapPluto which can be found here: https://www1.nyc.gov/site/planning/data-maps/open-data/dwn-pluto-mappluto.page.

This layer displays when zoomed in below 1:37,051-scale.

This map service is available to the public.

Geometry accuracy varies by contributing county.

Thanks to the following counties that specifically authorized Geospatial Services to share their GIS tax parcel data with the public: Albany, Cayuga, Chautauqua, Cortland, Erie, Genesee, Greene, Hamilton, Lewis, Livingston, Montgomery, New York City (Bronx, Kings, New York, Queens, Richmond), Oneida, Onondaga, Ontario, Orange, Oswego, Otsego, Putnam, Rensselaer, Rockland, Schuyler, Steuben, St Lawrence, Suffolk, Sullivan, Tioga, Tompkins, Ulster, Warren, Wayne, and Westchester.

The State of New York, acting through the New York State Office of Information Technology Services, makes no representations or warranties, express or implied, with respect to the use of or reliance on the Data provided. The User accepts the Data provided “as is” with no guarantees that it is error free, complete, accurate, current or fit for any particular purpose and assumes all risks associated with its use. The State disclaims any responsibility or legal liability to Users for damages of any kind, relating to the providing of the Data or the use of it. Users should be aware that temporal changes may have occurred since this Data was created.

Land Use MethodologyA significant effort was required to verify and correct the land use codes to produce an accurate parcel-specific land use database, especially given the large geographic extent of Suffolk County, the large number of individual parcels, and the variety of development across the County. In 2017, the Suffolk County Division of Planning & Environment began to comprehensively update its land use inventory for 2016 for all 581,000 land parcels in Suffolk County. The Division’s GIS was employed to link land use data with parcels shown on the Suffolk County Real Property Tax Map.

November 2025