Anne M. Danziger Assessor This email address is being protected from spambots. You need JavaScript enabled to view it.
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: 
(631) 224-5058


Quick Links:     Forms and Applications | Assessment Roll Search 

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.

    STAR Exemptions: (two types)

Basic STAR - Available for owner- occupied, primary residences where the resident owners' and their spouses income is less than $500,000 exempts the first $30,000 of the full value of a home from school taxes.

Enhanced STAR - Provides an increased benefit for the primary residences of senior citizens (age 65 and older) with qualifying incomes exempts the first $65,300 of the full value of a home from school taxes as of 2016-17 school tax bills (unchanged from 2015-16) 

STAR exemptions apply only to school district taxes. They don't apply to property taxes for other purposes, such as county, town or city


  Please note the STAR Program changes *

As a result of recent law changes, some homeowners will receive a STAR check directly from New York State instead of receiving a school property tax exemption. The amount of your benefit will be the same regardless of how you receive it. 

Beginning with the 2016-2017 school year, newSTAR applicants will need to register with the New York State Tax Departmentat   to receive a STAR check.  Therefore, i f you recently bought a new home in the Town of Islip or Suffolk County, you will need to  register by September 1  to receive your check in December. If you register after September 1, you’ll receive your check at a later date.

Current STAR exemption recipients

-- Current Basic and Enhanced STAR exemption recipients will keep their exemption as long as they continue to own their current home.

-- Current Enhanced STAR exemption recipients who are not enrolled in the Income Verification Program must continue to file a renewal application with their local assessor each year.

* The New York State Department of Taxation and Finance has developed a web based registration application, and phone registration for the STAR Check program.  To register or to ask questions please contact the State at (518) 457-2036 or online at

  School Tax Relief (STAR) Credit(click to download an informational flyer)


Click on one of the following links to download the form or application you need:

Exemption Required Form            

Please return completed forms to the Assessor's Office 

Application for Basic STAR Exemption   RP-425-B
Application for Enhanced STAR Exemption   RP-425-E
Renewal Application for Enhanced STAR Exemption   RP-425-Rnw
Supplement to Forms RP-425-E and RP-425-Rnw
Income for STAR Purposes Worksheet
Application for Partial Tax Exemption for Real Property of Senior Citizens  RP-467
Business, Commercial or Industrial Property Exemption                         RP-485-B
Alternative Veterans Exemption  RP-458-A
Cold War Veterans Exemption  RP-458-B
Disabilities and Limited Income Exemption   RP-459-C
First Time Home Buyer - New Construction Exemption  RP- 457
Residential Capital Improvement Exemption  RP-421-F
Volunteer Firefighter/Ambulance Worker Exemption  RP-466-C