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    Zoned GSD Office and Medical Site Title is generated by Realmo AI

    55 Carleton Avenue, East Islip, NY 11730

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    Claim this Listing
    For Sale
    $1,650,000

    SINGLE_FAMILY - East Islip, NY

    Type:Office
    Lot size:
    0.98 Acres
    Added:
    Oct 24, 2025
    Days on Market:
    256
    Last Refresh:
    Jul 6 at 4:06 am

    Property Features for 55 Carleton Avenue

    General Information

    Property type
    Residential
    Property subtype
    Office
    Zoning
    GSD
    Rooms
    Basement
    Parking
    18
    Fencing
    Chain Link
    Basement
    Unfinished
    Standard status
    Active
    APN
    0500-346-00-03-00-073-000
    Lot size
    0.98 Acres

    Taxes and HOA fees

    Tax Year
    2025
    Tax Annual Amount
    29360

    Utilities

    Utilities
    Cable Available
    Sewer type
    Public Sewer
    Heating system
    Forced Air, Natural Gas
    Cooling system
    Central Air
    Water source
    Public

    Building Details

    Year built
    1975
    Floors in Building
    1
    Number of units
    8
    Flooring type
    Combination
    Building materials
    Brick, Fiberglass Insulation, Stucco

    We can help!

    Contact an agent
    Joseph E. Donaghy

    Listing agent Joseph E. Donaghy License #10401392754

    Listing office Marylou Swan Realty Corp 322 S Country Rd, East Patchogue, NY

    Listing date Oct 24, 2025

    MLS# 928396

    Copyright © 2026 OneKey MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • 0.98‑acre commercial property on Carleton Avenue, the main thoroughfare into East Islip
    • Zoned GSD for office, medical, or veterinary use
    • Expansion potential for additional space up to 11,000 SF or redevelopment up to 17,000 SF
    • Year built 1975 with brick, stucco, and fiberglass insulation construction
    • Central air cooling and forced‑air natural gas heating
    • Public water and public sewer; cable available; chain‑link fencing

    Overview

    55 Carleton Avenue is a nearly 1-acre commercial property offered for sale, positioned on the Carleton Avenue main thoroughfare into East Islip. The site is zoned GSD and is described as well-suited for office, medical, or veterinary use, with a configuration that supports both expansion and redevelopment planning. The offering notes the ability to expand additional space up to 11,000 square feet or redevelop the entire site for a new building up to 17,000 square feet.

    The property’s stated advantage is visibility and accessibility along Carleton Avenue. It also highlights convenient regional access from Sunrise Highway and Southern State Parkway. Area context provided with the listing includes proximity to the Federal Courthouse (about two miles away) and Northwell South Shore University Hospital (about 2.5 miles away), supporting the site’s professional services and healthcare-oriented positioning.

    For buyers and operators seeking a flexible site for professional uses, the GSD zoning and redevelopment/exapnsion capacity are key considerations. The property is best evaluated for plans that align with office, medical, or veterinary occupancy, whether that involves incremental growth or a complete redevelopment of the site for a new building within the noted size limits.
    Property Profile Location Intelligence

    Current Use by Public Records

    Star Care Dialysis Physician Susan Pilon, LCSW Foster Care Service Brandon J. Broderick, ... Law Firm Melissa A Alkire Massage ... Alternative Medicine Practice Nicole Sewell Counselor

    Suggested Use

    Hotel & Motel Auto Parts Store Daycare Center Nursing Home Parking Lot & Garage Tech Support Center Cosmetic Store Kitchen & Bath Showroom Department Store Travel Agency

    Zoning and permitted uses should be independently verified with local authorities.

    Similar Places Nearby

    • East Islip TV Mounting — Adams St E, East Islip, NY 11730, United States

    Location Insight

    • Map
    • Local Demand
    City
    East Islip
    County
    Suffolk
    State
    New York
    Longitude
    -73.190617
    Latitude
    40.733431

    FAQs

    What type of property is this?
    Office space - Nearly 1-acre commercial site zoned GSD, positioned for office, medical, or veterinary use and redevelopment.
    Where is this office space located?
    The property is located at 55 Carleton Avenue East Islip, NY.
    What is the asking price?
    The asking price for this property is $1,650,000.
    What are key features of this property?
    This property features: 0.98‑acre commercial property on Carleton Avenue, the main thoroughfare into East Islip; Zoned GSD for office, medical, or veterinary use; Expansion potential for additional space up to 11,000 SF or redevelopment up to 17,000 SF
    More about this property
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