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Real Property
Tax Service Agency

Begining March 13, 2020, there will be only limited access to the services of the Suffolk County Real Property Tax Service Agency until further notice. Documents may be mailed to the agency at 300 Center Drive, Riverhead, New York 11901 or they may be delivered to the county center at the same address and left for processing. Questions should be addressed to


Click on one of the following underlined words and you will be directed to the numerous Real Property Tax Service Agency services and products. Most of the services provided by the Agency are at its Riverhead location where there is an owner index and tax map information with a pleasant staff to assist you on your quest.  The Tax Map Division has the responsibility and is the sole authority responsible for creating and maintaining the tax maps of Suffolk County.  Verification is a procedure that helps to maintain the most current information on each tax map parcel and is required by law prior to recording of documents.. 

Find information regarding Real Property Tax Service Agency's Land Information System (LIS) and AREIS ON THE INTERNET . At these sites you will learn how to subscribe to the hardcopy tax map albums or Real Property’s Internet subscription.       

Divisions and Services

Tax Map Division


Tax Map Division


Frequently Asked Questions



Suffolk County Government

H. Lee Dennison Bldg

100 Veterans Memorial Hwy
P.O. Box 6100
Hauppauge, NY 11788

Riverhead County Center

County Road 51
Riverhead, NY 11901