Welcome to the Planning & Development Application Portal
angie
"Welcome to the Planning & Development Application Portal, the online application system for the Town of Islip. We are excited to provide this convenient platform for you to file applications, access property information, and view the status of your application from the comfort of your own home or office. Whether you’re a resident, business owner or visitor, our online system is designed to enable your access to information easier. We are committed to providing excellent service and support to our community, and this online system is just one of the many ways we continue to serve the public" — Angie
* To begin, please click login to log in or register to register a new account.
Important Notice
Please be advised that the updated NYS Uniform Code and State Energy Code will become effective December 31, 2025. Any building permit applications that have not been accepted for intake with filing fee paid prior to December 31, 2025 will be reviewed under the amended and updated rules.

Notice of Adoption

Updating the NYS Uniform Code and State Energy Code

On July 27, 2025, the State Fire Prevention and Building Code Council (the “Code Council”) adopted rules that amended and updated the New York State Uniform Fire Prevention and Building Code (the “Uniform Code”) and the State Energy Conservation Construction Code (the “Energy Code”). The Department of State, acting on behalf of the Code Council, filed Notices of Adoption of these rules. The Notices of Adoption appear in the October 1, 2025 edition of the State Register.

Current List of Fileable Permits
The below Permits/Applications can be filed and tracked online in real time. Click a below application to see it's related forms and links.