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

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. 

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.

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

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

Must be completed and certified by the design professional or third party inspection agency after installation.

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.

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

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

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.

Before an application is accepted by the Building Department, the requirements in this checklist must be met.

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.”

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

2017 Uniform Code Supplement detailing code requirements for barriers (fencing) and alarms.

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

All construction plans accompanying residential permit applications must contain the minimum requirements listed on this checklist.

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.

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.

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.

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

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.