A Message from the Supervisor

“Welcome to Islip, the 3rd largest town in New York State, but with an endearing small town feel. We are so proud of our town…our beaches, golf courses, marinas, parks, housing opportunities for all, businesses, industrial parks, healthcare and educational institutions including our own Islip MacArthur Airport that provides many job opportunities. I sincerely hope you find this website helpful.” - Angie


CLICK HERE to View Planning & Development Operations and Temporary Application Process Requirements During COVID-19

The Planning & Development Divisions, while closed to the public during the COVID-19 virus, are continuing to operate ensuring that applications are processed and constituent inquiries are answered in a timely manner. The offices are staffed at 50% in order to comply with the Governor’s mandate for social distancing for essential services, and the balance of our staff is working from home to ensure the public continues to be served.

While our process has changed slightly, Planning, Engineering, Building and the Zoning Board of Appeals Divisions are still committed to processing your applications as quickly and efficiently as possible. A cursory review is still required to minimize unnecessary delays in the processing of incomplete applications. Building, Plumbing and Engineering inspections will continue for any construction permitted under Governor Cuomo’s executive order.

CLICK HERE to review the temporary application submittal guidelines for each Planning Division.

The Town of Islip Department of Planning and Development is responsible for enhancing the quality of life for its residents and creating an environment that allows businesses to grow through comprehensive planning that balances social, economic and environmental goals. The Department of Planning and Development consists of five divisions – Planning, Building, Engineering and Contracts, Economic Development and Zoning Board of Appeals. In order to accomplish its mission, the Department focuses on the following:

  • Comprehensive Plan and Long-Range Planning
  • Environmental Assessments and Impact Review
  • Capital Improvement Programming
  • Grant Programming and Implementation
  • Geographic Information Systems (Computer mapping)
  • Surveying and Mapping
  • Flood Plain Management
  • Building Permit Review and Inspections
  • Engineering Site Plan Review and Inspections
  • Contract Administration
  • Permit Reviews for: Subdivisions and Road Openings, Planning Board Special Permits, Site Plan review, Town Board Change of Zone, Wetlands and Watercourses, and Land Clearing
  • Economic Development
  • Zoning Board of Appeals Administration

View Town of Islip Zoning Map


Zoning is a tool that municipalities use to regulate the use and development of properties. This link will take you to the Town of Islip Zoning Map, where you can see the underlying zoning of a property and the regulations associated with that zone. All information presented on this site is subject to verification by the departments or agencies responsible for producing, entering, and updating that data for the Town of Islip.

View All Planning & Development Documents A–Z


New York State Uniform Fire Prevention and Building Code (the “Uniform Code”), and State Energy Conservation Construction Code (the “Energy Code”) updates.

On December 6, 2019, the State Fire Prevention and Building Code Council (the “Code Council”) adopted rules that amend and update 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, has filed Notices of Adoption of these rules. The Notices of Adoption will appear in the February 12, 2020 edition of the State Register. On and after February 12, 2020, the Notices of Adoption can be viewed by clicking the “February 12” link at: http://w

The rules will become effective on May 12, 2020.
There will be no transition period.

Beginning on May 12, 2020, regulated parties submitting building permit applications must comply with the 2020 NYS Code Books.