PLANNING & DEVELOPMENT

Architectural elevation approval is required for all Building Permit application submissions that affect the exterior of a commercial property.

Step by step directions for filing applications electronically, including instructions on uploading documents

This is a fillable form.
Not to be used for the following permit types: Certificate of Compliance, Demolition, Elevator, Equine, PODS/Portable Storage, Pools, Plumbing/HVAC, Signs, Site Work Only (Engineering application), Solar (25KW or less), Temporary Trailers, Truss Signs.

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.

This application must accompany any residential building permit application that employs truss construction, pre-engineered wood construction and/or timber construction.

RDP to complete this checklist to ensure the plans contain the minimum NYS and TOI requirements prior to application submission. This completed checklist must accompany the permit application.

RDP to complete this checklist to ensure the plans contain the minimum NYS and TOI requirements prior to application submission. This completed checklist must accompany the permit application.

This is a fillable form.
The Registered Design Professional must complete this checklist and submit with the application to ensure the plans contain the minimum New York State and Town of Islip code requirements for review.

Please Note: Site Plan Approval is required before a Site Work Only Permit Application can be considered.

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

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

All Construction Documents submitted to the Town of Islip must contain the note as described on this document.

Certificate of Compliance applications should be used in lieu of a building permit application if the structure was built more than 4 years ago.

Dewatering permits are required when it is not possible to contain pumped water on site during construction activities (i.e. foundation excavation in shallow groundwater areas, swimming pool installations/liner changes, etc.), or to register residential sump pumps having permanent discharges into the street or Town of Islip drainage systems.

The attached documentation is required prior to Town Board acceptance of an easement when land is not being dedicated.

Electrical Inspection Certificates (aka Electrical Certificates) must be obtained from any one of the qualified agencies on this list.(Electrical Contractors - In order to get on the list of qualified agencies, please refer to the Electrical Inspection Agency Qualification Requirements form.)

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

Step by step directions for filing Engineering Division applications electronically, including instructions on uploading documents.

For questions related to Engineering Division applications or inspections, please fill out the attached form and email it to This email address is being protected from spambots. You need JavaScript enabled to view it..

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

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

A land clearing permit must be obtained before clearing an area exceeding two hundred (200) square feet or removing any tree larger than ten (10) inches in caliper.

When a dedication of land is proposed to the Town of Islip (e.g.: road widening, recharge basin, conservation area, corner radius), the attached documentation is required prior to the Town Board acceptance of the dedication.

Download the Town's most recent annual MS4 Compliance Report to the New York State Department of Environmental Conservation. This report shows the Town's progress in meeting federal and state stormwater management requirements in accordance with the Town’s State Pollutant Discharge Elimination System permit and Clean Water Act.  Public comments will be accepted through May 31, 2018 and can be sent to This email address is being protected from spambots. You need JavaScript enabled to view it..  For more information please contact the Planning Department.”

Download the Town's most recent annual MS4 Compliance Report to the New York State Department of Environmental Conservation. This report shows the Town's progress in meeting federal and state stormwater management requirements in accordance with the Town’s State Pollutant Discharge Elimination System permit and Clean Water Act. Public comments will be accepted through July 7, 2019 and can be sent to This email address is being protected from spambots. You need JavaScript enabled to view it.. For more information please contact the Planning Department.

Download the Town's most recent annual MS4 Compliance Report to the New York State Department of Environmental Conservation. This report shows the Town's progress in meeting federal and state stormwater management requirements in accordance with the Town’s State Pollutant Discharge Elimination System permit and Clean Water Act. Public comments will be accepted through May 28, 2021 and can be sent to This email address is being protected from spambots. You need JavaScript enabled to view it.. For more information please contact the Planning Department.

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

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

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

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.

When a dedication is proposed to the Town of Islip for a new public road resulting from a subdivision or road opening, the attached documentation is required prior to the Town Board acceptance of the dedication.

Creation of a new road or extension of an existing road.

FORM CAN BE FILLED IN ELECTRONICALLY.

FOR TRUSS SIGNS, PLEASE USE BUILDING PERMIT APPLICATION.

Effective July, 2020, Site Work Only Permits will be issued by the Engineering Division.

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

The Subdivision and Land Development Regulations contains helpful information regarding the Subdivision, Site Plan and Land Clearing process including design submission and improvement standards. This 2019 Amendment includes updates to the appendices. If you have any questions, please give our Engineering Division a call at 631-224-5360.

Download the Town of Islip Comprehensive Plan Update Module number CP2011-01.
This document contains new demographic and other data updates which will form the basis for future planning recommendations for Islip.
If you have any questions, please call the Department of Planning at 631-224-5450.

Required for any commercial kitchen hood application.

These guidelines can help you determine if your project requires a permit.

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

If you have questions regarding how a property can be developed or need a Zoning Denial in order to appear before the Zoning Board of Appeals (ZBA), please fill out this form (it can be filled out electronically) and email it to This email address is being protected from spambots. You need JavaScript enabled to view it.. You will receive a response from the Zoning Department either by phone or email, typically within 3 business days.

Instructions on how to vavigate the Zoning Viewer.