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    55 Carleton Ave East Islip, NY 11730

    For Sale
    $1,800,000

    Office - East Islip, NY

    Type:Office
    Property size:
    6,100 SF
    Lot size:
    0.98 Acres
    Days on Market:
    52
    Last Refresh:
    Dec 14 at 3:06 pm

    Property Features for 55 Carleton Ave

    General Information

    Property type
    Commercial Sale
    Property subtype
    Office
    Standard status
    Active
    Zoning
    GSD
    Rooms
    Basement
    APN
    0500-346-00-03-00-073-000
    Parking
    18
    Exterior features
    Fencing
    Fencing
    Fenced
    Basement Y/N
    1
    Size
    6,100 SF
    Lot size
    0.98 Acres

    Utilities

    Heating system
    Forced Air, Natural Gas
    Cooling system
    Central Air

    Building Details

    Year built
    1975
    Number of units
    8
    Building materials
    Brick, Glass, Stucco
    Architectural style
    Other

    Marylou Swan Realty Corp. (631) 289-5550 [email protected]

    Listing agent Joseph E. Donaghy (631) 289-5550 License #10401392754

    Listing date Oct 24, 2025

    MLS# 928396 Listing URL

    Copyright © 2025 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.

    Overview

    High-Visibility Commercial Property on Carleton Avenue

    Located on Carleton Avenue, the main thoroughfare into East Islip, the property at 55 Carleton Avenue offers a 0.98-acre commercial site suitable for office, medical, or veterinary purposes. Zoned GSD, the site provides exceptional exposure and accessibility. The property allows for expansion of additional space of up to 11,000 square feet or redevelopment of the entire site for a new building up to 17,000 square feet. The existing building is 6,100 square feet. Situated approximately two miles from the Federal Court House and 2.5 miles from Northwell South Shore University Hospital, the location provides convenient access to Sunrise Highway and Southern State Parkway. The East Islip area features strong commercial activity and desirable demographics, making it suitable for professional services seeking long-term growth and visibility. The property is in Suffolk County, New York, with postal code 11730.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Star Care Dialysis Doctor Susan Pilon, LCSW Social Worker Brandon J. Broderick, ... Personal Injury Attorney Melissa A Alkire Massage ... Massage Therapist Nicole Sewell Counselor

    Suggested Use

    Realty agency Law Firm Restaurant Spa & Massage Dental Office Hair Salon Nail Salon Clothing Store Building Supply Gym & Fitness

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

    Similar Places Nearby

    East Islip TV Mounting

    Location Insight

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

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    FAQs

    What type of property is this?
    Office Property / Space - 0.98-acre commercial property suited for office, medical, or veterinary use.
    Where is this office property / space located?
    The property is located at 55 Carleton Ave East Islip, NY.
    What is the asking price?
    The asking price for this property is $1,800,000.
    What are key features of this property?
    This property features: - High-visibility 0.98-acre commercial property on Carleton Avenue.; - Zoned GSD, suitable for office, medical, or veterinary use.; - Opportunity for expansion up to 11,000 sq. ft. or redevelopment up to 17,000 sq. ft.
    (631) 289-5550
    Request Owner's contact information
    55 Carleton Ave East Islip, NY 11730
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    East Islip, NY 11730
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    Realmo Value Estimation

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.

    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.

    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
    55 Carleton Ave East Islip, NY 11730
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