Assessor

Phone: (631) 224-5585
Contact: Ronald F. Devine, Jr. - Assessor
Fax: (631) 224-5572
Email: This e-mail address is being protected from spambots, you need JavaScript enabled to view it

Assessor's Office
40 Nassau Avenue
Islip NY 11751

(631) 224-5058 STAR OFFICE

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

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.

Town of Islip

Assessor Forms