NEW YORK · 2025 TAX PARCELS
Suffolk County, New York
Explore residential tax parcels in seven Suffolk towns.
2025 assessments · Reported and calculated full market values · Current official parcel boundaries
Partial county coverage: East Hampton, Huntington and Islip are excluded pending market values. Includes Babylon, Brookhaven, Riverhead, Shelter Island, Smithtown, Southampton and Southold.
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Ordered by full market value, highest first. Select a parcel to locate it on the map.
| Property address | Municipality | Land assessment | Improvement assessment | Full market value |
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How to read this explorer
This explorer maps 9,867 residential tax parcels above $3 million across seven towns. It is not a complete Suffolk County inventory. East Hampton, Huntington and Islip are omitted pending usable market values. Twenty-two additional candidate records lack boundary matches and are omitted.
There are 5,326 mapped parcels above $5 million and 2,055 above $10 million. These thresholds overlap. Tax parcels are not independently reconciled to physical homes.
Uses 2025 assessment values. Southampton and Babylon market values are calculated from total assessments using the uniform assessment percentages documented in their official 2025 rolls: 63% and 0.59%, respectively. Other included towns use full market values reported in the state extract. Property details identify the value basis. These are assessment estimates, not sale or listing prices.
Includes One Family Year-Round Residence records (class 210), without excluding condos in that class. Separately coded Condominium records (class 412) were also checked; none qualified above $3 million in the seven-town working set. Other multifamily, estate, rural and seasonal classifications are outside the current map scope.
Parcel boundaries and acreage come from the current county GIS layer; a uniform 2025 boundary vintage has not been established. Acreage is the GIS-reported value, not a survey. Frontage and depth are shown as reported; units have not been independently verified.
Sources: New York State assessment data, Suffolk County parcel GIS, Southampton 2025 roll and Babylon 2025 roll.