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


Folder Building Division


pdf Building Permit – Solar Permit Application and Requirements (NYS Unified Solar Permit) Popular

NY State Unified Solar Permit Application for systems with a rated DC capacity of 25 kW or less.

pdf Inspection Process – Building & Plumbing Popular

General guideline for applicants and contractors in understanding the inspection process for issued permits


NYSBC 2020 requirements for any new building or new building addition over one story in height

pdf Building Permit – Elevator Permit Application and Requirements Popular

This is a fillable form. Handwritten applications will not be accepted

pdf Type I and Type II Kitchen Hood Submittal Checklist 2020 Popular

Required for any commercial kitchen hood application.

pdf RDP Instruction and Compliance Forms for New Commercial Buildings and Additions Popular

This packet provides guidance to Registered Design Professionals for preparing a NYS Code compliant submission, including a summary, Structural Design Affidavit, NYS Building Code Evaluation Summary (TOIBES), Attachment 1 and 2.

pdf Building Permit Application - Demolition Popular

This application is to be used for the demolition to a structure only. For interior demolitions (leaving the structure in tact), please use the Building Permit Application form as this would be considered an Interior Alteration to Vacant Space.

pdf Compliance Permit Application and Requirements – COMMERCIAL Popular

A Compliance Permit Application should be used in lieu of a Building Permit Application when a) the structure was built more than 4 years ago without a permit, and/or b) when the building permit exceeds its allowable renewals.

pdf Electrical Inspection Agency Qualification Requirements Popular

Tagged in contractor, Electrical

Requirements for companies interested in becoming qualified to perform electrical inspections in the Town of Islip

pdf Pool/Hot Tub/Spa Barriers and Alarms Popular

2020 Residential Code of New York State detailing code requirements including barriers (fencing) and alarms.

pdf Pool, Hot Tub, Spa Permit Application and Requirements Popular

Please review the application form in its entirety for important information about what additional permits may be required, along with a CO Checklist.

pdf Workers Compensation and Disability Requirements Popular

INSURANCE REQUIREMENTS: Workers Compensation and Disability Requirements.  NOTE: See separate form for Plumbing/HVAC Insurance permit requirements.

pdf Fee Schedule for the Building Division - Commercial Popular

Tagged in building, fees, Permit, plumbing

Includes fees for Commercial Building Permits and Commercial Plumbing Permits

pdf Fee Schedule for the Building Division - Residential Popular

Tagged in building, fees, Permit, plumbing

Includes fees for Residential Building Permits and Residential Plumbing Permits