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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

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Folder Building Division - Permits Section

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 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 Certificate of Occupancy Checklist Popular

Requirements needed to obtain a CO/CC on your pool.

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

pdf Truss Sign Requirements – Residential Popular

This form should be completed by the applicant and submitted to the Town with a Building Permit Application for a Truss Sign.

pdf Pool, Hot Tub and Spa Safety Brochure Popular

Pool Safely - Guidance For Safety - The Pool and Spa Safety Act

pdf Qualified Inspection Agencies Popular


Electrical Inspection Certificates / Electrical Certificates must be obtained from an agency qualified by the Town of Islip. In order to get on the list of qualified agencies, please refer to the Electrical Inspection Agency Qualification Requirements form.

pdf Temporary Trailer and Portable Storage Unit Permit Application Popular



Application for temporary trailer and temporary storage: Commercial Uses – construction trailer, office trailer, temporary storage trailer, and Residential Uses - temporary residential trailer or portable storage units.

pdf Building Permit Application Popular

Do NOT use this application for: Certificate of Compliance, Demolition, Elevator, Equine, Portable Storage Units, Pools/Hot Tubs, Plumbing/HVAC, Signs (other than Truss) or Temporary Trailers.