4052 New York 42, Monticello, NY 12701, USA

845-794-2500 Ext. 324


Office Hours
Monday-Friday 8:30-4:30

The Assessor is responsible for the valuation of real property in the Town of Thompson and the Village of Monticello.  The office is also responsible for the administration of various tax exemptions in accordance with New York State Real Property Tax Law, and local laws, along with the maintenance of property inventory records.  Click here for more information about the Job of the Assessor.

Assessor Contacts

Van B. Krzywicki
IAO, Sole Appointed Assessor

Angela Ruggeri
Assessor Clerk

Richard McClernon
Data Collector

Link to State Forms by Number

Additional Information

Key Facts and Figures: Town of Thompson, Sullivan County NY

Assessment Information

Exemption Administration

Tax Grievance Information

Property Analysis Tools