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
Most Popular Planning & Development Documents:
View All Planning & Development Documents A–Z
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pdf 2017 MS4 Compliance Report
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 storm-water management requirements in accordance with the Town’s State Pollutant Discharge Elimination System permit and Clean Water Act. Public comments can be emailed to This email address is being protected from spambots. You need JavaScript enabled to view it. and will be accepted through November 9, 2017. For more information please contact the Planning Department.
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pdf Accessory Apartment ApplicationPopular
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pdf Area Variance ApplicationPopular
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pdf Building Permit ApplicationPopular
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.
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pdf Change of Zone Application, Modification of Covenants and Restriction and, Town Board Special Permit ApplicationPopular
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pdf Compliance Permit - CommercialPopular
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pdf Compliance Permit - ResidentialPopular
Required for structures built 4+ years ago.
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pdf De-watering Permit Application
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.
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pdf Electrical CertificatesPopular
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pdf Fire Damage Repair RequirementsPopular
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pdf Home Occupation RequirementsPopular
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pdf Land Dedication Checklist
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.
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pdf Land Grading/ClearingPopular
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pdf Major Subdivision ApplicationPopular
Subdivisions of land involving the creation of a road or more than 5 lots. -
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pdf Minimum Requirement Checklist for Residential PlanPopular
Before an application is accepted by the Building Department, the requirements in this checklist must be met.
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pdf Minor Subdivision ApplicationPopular
Subdivisions of land involving the creation of up to 5 lots on an existing street. -
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pdf MS4 Annual Compliance Report 2018
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.”
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pdf MS4 Annual Compliance Report 2019Download 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.
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pdf Plumbing/HVAC Permit ApplicationPopular
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pdf Pool / Hot Tub Barriers and AlarmsPopular
2017 Uniform Code Supplement detailing code requirements for barriers (fencing) and alarms.
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pdf Pool / Hot Tub Certificate of Occupancy ChecklistPopular
Requirements needed to obtain a CO/CC on your pool.
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pdf Pool / Hot Tub Permit ApplicationPopular
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pdf Pool, Hot Tub and Spa Safety BrochurePopular
Pool Safely - Guidance For Safety - The Pool and Spa Safety Act
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pdf Prove It to Move It ProgramPopular
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pdf Retaining Wall RequirementsPopular
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pdf Road Dedication Checklist
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.
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pdf Road Opening ApplicationPopular
Creation of a new road or extension of an existing road.
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pdf Sign ApplicationPopular
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pdf Sign Permit Application (for Truss Signs, use Building Permit Application)Popular
FORM CAN BE FILLED IN ELECTRONICALLY.
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pdf Signature AffidavitPopular
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pdf Site Plan ApplicationPopular
All commercial, industrial, institutional, and multi-family planned unit developments are required to obtain site plan approval for conformance with all Town of Islip Zoning Ordinance Standards and Land Development Regulations prior to the issuance of any permits. -
pdf Special Exception ApplicationPopular
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pdf Structural Code Compliance Requirement for Wood Framed and Cold Formed Steel Framed Building Popular
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pdf Subdivision and Land Development RegulationsPopular
The Department of Planning is pleased to offer the latest version of the Subdivision and Land Development Regulations on the website. This document contains helpful information regarding the Subdivision, Site Plan Review, and Land Clearing process. The document also contains the design submission and improvement standards required by the Engineering Division. The most recent version of these regulations was adopted by the Town Board in 2007. Updates include new requirements for Stormwater Pollution Prevention Plans as mandated by the New York State Department of Environmental Conservation. PLEASE NOTE THAT SOME OF THE APPLICATION FORMS INCLUDED IN THIS BOOK HAVE BEEN MODIFIED AND ARE SUPERCEDED BY THE NEWER FORMS DEPLOYED ON THIS PAGE. If you have any questions, please give our Engineering Division a call at 631-224-5360.
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pdf Temporary Trailer and Portable Storage Unit Permit ApplicationPopular
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 Town Board Zoning Process Flow ChartPopularThis flow chart provides a general graphical depiction of a typical Town Board Zoning process. This applies to: Change of Zone, Town Board Special Permits, and Modification of Deed Covenants and Restrictions. This diagram focuses primarily on the Town's internal process. We also recommend contacting external State and County agencies for additional details on their processes as well. We also recommend you download a companion document called "Will my Zoning application be granted?" If you'd like to make a zoning application, please use the "Change of Zone, Town Board Special Permit, Mod. DCRs" application above. If you have any questions about the zoning process, please contact our office at 631-224-5450.
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pdf Town of Islip Comprehensive Plan Update - CP2011-01
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. -
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pdf Workers Compensation and Disability RequirementsPopular
INSURANCE REQUIREMENTS: Workers Compensation and Disability Requirements. NOTE: See separate form for Plumbing/HVAC Insurance permit requirements.
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pdf Zoning Map Request FormPopular