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How To Find Your Tax Map Number in Suffolk County, NY.

- What's a Tax Map Number and How Do I Find Mine?

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The government of Suffolk County on Long Island, NY, maintains a Tax Map Division within its Real Property Tax Service Agency. There are more than 585,000 parcels of land in Suffolk County. Although there may be similar addresses in the county, each parcel has its own unique tax map number to positively identify it. This information is listed on your property tax bill.

Each parcel of land on a tax map will include the following types of identification: there will be a district, section, block and lot number. An example would be the following DSBL (Division, section, block, lot) numbers: if a tax bill contains the numbers 0200, this would indicate that the district is Brookhaven. 00100 would indicate Section 1, 0100 means that it is Block 1, and 001000 would indicate Lot 1.

If you are looking to split a lot, or to build a structure on your lot in Suffolk County, etc., you should first check the parcel zoning and variance requirements of your town or village building and planning department.

If you don't know your tax map number in Suffolk County, it's easy to find out. Just call your local Town Assessor's office or village clerk.

Below are the phone numbers for the clerk's offices in the villages of Suffolk County, NY, in alphabetical order:

  • Village of Amityville clerk's office: (631) 264-6000

  • Village of Asharoken clerk's office: (631) 261-7098

  • Village of Babylon clerk's office: (631) 669-1500

  • Village of Belle Terre clerk's office: (631) 928-0020

  • Village of Bellport clerk's office: (631) 286-0327

  • Village of Brightwaters clerk's office: (631) 665-1280

  • Village of Derring Harbor clerk's office: (631) 749-0020

  • Village of East Hampton clerk's office: (631)324-4150

  • Village of Greenport clerk's office: (631) 477-2385

  • Village of Head of the Harbor clerk's office: (631) 584-5500

  • Village of Huntington Bay clerk's office: (631) 427-2843

  • Village of Islandia clerk's office: (631) 348-1133

  • Village of Lake Grove clerk's office: (631) 585-2000

  • Village of Lindenhurst clerk's office: (631) 957-7500
  • Village of Lloyd Harbor clerk's office: (631) 549-8893

  • Village of Mastic Beach clerk's office: (631) 281-2326

  • Village of Nissequogue clerk's office: (631) 862-7400

  • Village of North Haven clerk's office: (631) 725-1378

  • Village of Northport clerk's office: (631) 261-7502

  • Village of Ocean Beach clerk's office: (631) 583-5940

  • Village of Old Field clerk's office: (631) 941-9412

  • Village of Patchogue clerk's office: (631) 475-4300

  • Village of Poquott clerk's office: (631) 331-0402

  • Village of Port Jefferson clerk's office: (631) 473-4724

  • Village of Sag Harbor clerk's office: (631) 725-0222

  • Village of Saltaire clerk's office: (631) 583-5566

  • Village of Shoreham clerk's office: (631) 821-0680

  • Village of Southampton clerk's office: (631) 283-0247

  • Village of Quogue clerk's office: (631) 653-4498

  • Village of The Branch clerk's office: (631) 265-3315

  • Village of Westhampton Beach clerk's office: (631) 288-1654

  • Village of West Hampton Dunes clerk's office: (631) 288-6571

Town Assessor Offices of Suffolk County:

Town of Babylon: (631) 957-3014

Town of Brookhaven: (631) 451-6300

Town of East Hampton: (631) 324-4187

Town of Huntington: (631) 351-3226

Town of Islip: (631) 224-5585

Town of Riverhead: (631) 727-3200

Town of Shelter Island: (631) 749-1080

Town of Smithtown: (631) 360-7560

Town of Southampton: (631) 283-6020

Town of Southold: (631) 765-1937

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