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Real Property
Tax Service Agency

Penny Wells Lavalle



 300 Center Drive
Riverhead, New York 11901

 (631) 852-1550
Fax: (631) 852-1566
 Penny Wells LaValle


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


Public Service Counter


Public Service Counter

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