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Town Hall Annex Project

Preparation for Construction, new traffic and access patterns: Learn More.

  • A stately brick Town Hall Annex with a white cupola stands against a blue sky.
  • Town Hall Annex building, photographed from a slightly angled perspective with parked cars in the foreground.
  • A close-up view of the Town Hall Annex entrance with illustrated people on the walkway.
  • closer view of the Town Hall Annex entrance, focusing on the Art Deco-style doorway.
  • B EditA front-facing view of the Town Hall Annex showing the building's symmetrical design, with a parking area and illustrated pedestrians in the foreground.
  • A side angle view of the Town Hall Annex showing its white upper story addition above the brick base, with landscaping and parked cars in the foreground.

The Town of Islip is pleased to finally be able to undertake this project and have the opportunity to address the ADA handicap needs of our residents, while at the same time add needed space to our nearly 100 year old Town Hall. We are able to do this with the restricted Federal ARPA funds we received. All of this will enhance the experience for residents and help Town staff to better serve the community.

The Town Hall Annex Project also seeks to relocate critical documents, equipment, and staff from the flood-prone basement, and consolidate the Planning and Development Department to boost efficiency. Additionally, the project will add upgrades to IT infrastructure for increased resiliency. The new Annex will be energy-efficient, solar-ready, and designed with a focus on accessibility and sustainability.

Before | After

North-East Side before work beganNorth-East Side as of 5/27/2025

CURRENT STATUS UPDATE:

  • Nassau Avenue closure starts Monday, March 10th at 7AM, with reopening at 7PM with new traffic pattern when Nassau Avenue becomes two-way.
  • On Wednesday and Thursday March 12th/13th, the temporary ADA handicap ramp will be constructed at the Main entrance. During that time, the Main entrance will be closed, and visitors/constituents will access the Town Hall from East side employee entrances.
  • Starting Friday March 14th, the construction fencing will be installed, and access to municipal parking lot will change. Learn More.

Questions or Concerns? Let us know directly by emailing This email address is being protected from spambots. You need JavaScript enabled to view it., or tap the letter icon below.



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QUESTIONS OR CONCERNS?



FREQUENTLY ASKED QUESTIONS

How will traffic and access to the Town Hall be affected?

During the construction:

  • Please see the diagram HERE and follow the posted traffic and wayfinding signs.
  • At the start of the construction project, a new traffic pattern will be established, eliminating the eastern portion of the circle and turning the west side of Nassau Avenue into a two-way street.
  • All visitors' pedestrian access will remain at the Town Hall front door, however, there will be a modified and protected access path leading to the front door. Please follow the posted signs.
  • Construction Traffic Plan can be viewed HERE.

After construction:

  • The two-way traffic pattern on Nassau Rd will remain, and a slightly modified access to/from Manitton will be created, addressing a new traffic pattern.
  • The egress from the municipal parking lot at Manitton will reopen.
  • All visitors' access will shift to a new accessible entrance at the South/East side of the Annex, adjacent to the parking area. The parking pattern will change, and the landscaping buffer close to the residence on Manitton will become larger.
When will the project construction begin and end?
  • The Town Hall Annex construction will start in March 2025. Please follow the Status Updates on this webpage, where all updates will be posted.
  • The construction completion is in December of 2026.
  • The Town, the consulting team, and the construction team will do whatever is possible to minimize the impact of construction.
What is the overall scope of the Town Hall Annex project?
  • Improve Accessibility: Enhance ADA compliance and provide a more inclusive environment.
  • Enhance Resiliency: Relocate staff and critical infrastructure from the flood prone basement, upgrade energy-efficiency, and protect IT infrastructure.
  • Increase Efficiency: Consolidate departments, streamline processes, and improve communication.
  • Protect and Preserve Historical Records: Safeguard and store historical data and documents in a secure and climate-controlled environment.
When will construction take place?
  • Construction will take place during business hours. The site will be closed at weekends and the work is planned between the business hours of 7:00 AM - 5:30PM.
  • The construction site will be closed during weekends. For any occasional construction events outside of these parameters, the notifications will be posted on this page, and e-alerts will be sent (please sign up HERE).
Will the site be secured?
  • The construction site will be secured and wayfinding signs will be posted.

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