Supervisor Tom Croci

Assessor

Ronald F. Devine, Jr. Assessor
Assessors Office
40 Nassau Avenue
Islip, New York 11751
(631) 224-5585
(631) 224-5572

Front Office Hours:
Monday to Friday 8:30 am to 4:00 pm

By Telephone:
Monday to Friday 8:30 am to 5:00 pm

Basic and Enhanced STAR Exemptions:
For information (631) 224-5058

| Forms | Search The Town's Assessment Roll |



The Assessor's Office is responsible for determining the assessed value of more than 97,000 parcels within the town for purposes of taxation. The office continually updates ownership records through deed transfers. Physical data is collected in order to maintain inventory records. This includes new construction, demolition, apportionment and consolidation of real property.


The Assessor's office is also responsible for the review and approval of all real property tax exemptions which include STAR (Basic & Enhanced), Veterans, Senior Citizen, Volunteer Firefighter & Ambulance Workers, Disability, Religious & Not-for Profit, Home Improvement, Business, First-Time Home Buyer and Agricultural. All applications and/or renewals for real property tax exemptions must, by law, be filed with the Assessor's Office no later than March 1st of each year.