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    Islip, NY Islip Terrace, NY Bayshore, NY Brentwood, NY Oakdale, NY Central Islip, NY Brightwaters, NY Bohemia, NY
    Zoned GSD Office and Medical Site
    Updated: Oct 14, 2025
    Zoned GSD Office and Medical Site

    55 Carleton Ave, East Islip, NY 11730

    $1,650,000
    6,100 sqft 0.98 AC lot
    0.98‑acre commercial site on Carleton Avenue (main thoroughfare into East Islip) with GSD zoning for office, medical, or veterinary use
    Expansion potential for additional space up to 11,000 sq. ft., or redevelop the site for a new building up to 17,000 sq. ft.
    18 parking spaces available for customers and staff
    Central Air cooling and heating listed as "3"
    Easy access from Sunrise Hwy and Southern State Parkway
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    This listing looks promising.

    Here's a quick look at some key insights for

    55 Carleton Ave, East Islip, NY 11730

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    • Est. Cap Rate

      6.4%
      Above avg (5.9%)

    • Est. NOI

      $105K
      Annual

    • Price @ 7% Cap

      $1.5M
      Suggested
    View Property Analytics
    Multi-Tenant Office Building with 7 Offices
    Updated: Feb 16
    Multi-Tenant Office Building with 7 Offices

    128 Carleton Avenue, East Islip, NY 11730

    $800,000
    0.28 AC lot
    0.28‑acre multi‑tenant office building in GMT zoning
    Seven private offices plus spacious conference room
    Complete 2020 renovation including HVAC and exterior siding updates
    Kitchenette and two renovated bathrooms
    Detached storage garage for storage or expanded use
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    Office Building with Expansion Potential
    Office Building with Expansion Potential

    55 Carleton Avenue, East Islip, NY 11730

    $1,650,000
    0.98 AC lot

    Zoned GSD on a 0.98-acre site with HVAC and natural gas heat, positioned for office, medical, or veterinary use.

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    Renovated Multi-Tenant Office Building
    Renovated Multi-Tenant Office Building

    128 Carleton Ave, East Islip, NY 11730

    $800,000

    Renovated office building with seven private offices, conference room, kitchenette, and two bathrooms plus detached storage garage.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Based on your search, we've compiled 52 Potential Opportunities for your consideration. Besides 4 Active listings in East Islip, NY, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 40 Off-Market properties to explore as potential leads, plus 4 Land Listings that present a potential for development.

    Opportunities in Nearby Cities

    Here are 4 Similar properties we found in Nearby Locations for your consideration.

    Hauppauge Office Space For Rent
    Hauppauge Office Space For Rent

    99 Smithtown Bypass, Hauppauge, NY 11788

    Contact for pricing
    16,000 sqft

    16,000 sqft Hauppauge office space ideal for medical/professional use.

    View details
    Office Building with Unfinished Basement
    Office Building with Unfinished Basement

    420 Townline Road, Hauppauge, NY 11788

    $799,000

    As-is office building featuring hardwood floors, 200-amp electric, and a full unfinished basement plus rear parking easement.

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    Three-Story Office Building Portfolio
    Three-Story Office Building Portfolio

    Bayshore, NY 11706

    Contact for pricing

    Three office buildings are offered for sale with an office-ready setup.

    View details
    NNN Property Portfolio
    NNN Property Portfolio

    Bayshore, NY 11706

    $3,499,000

    Fully leased commercial assets include multiple suites, a separate building, and parking for occupants and visitors.

    View details

    Potential Development Sites for Consideration

    Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

    Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

    Amityville Land For Sale
    Amityville Land For Sale

    770 N Broadway, Amityville, NY 11701

    $1,999,990
    0.95 AC lot

    0.95 acre commercial land in Amityville, NY.

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    Approved Commercial Development Lot
    Approved Commercial Development Lot

    V/L Versa Place, Shirley, NY 11967

    $650,000
    0.50 AC lot

    Vacant, zoned commercial lot with approvals to build a two-story retail/office building with elevator.

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    Zoned Commercial Development Lot
    Zoned Commercial Development Lot

    V/L Versa Place, Shirley, NY 11967

    $650,000
    0.50 AC lot

    Vacant J6-zoned site with approved plans to build a two-story retail/office building with elevator.

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    Commercial Land Along Highway
    Commercial Land Along Highway

    1467 Montauk Highway, Mastic, NY 11950

    $950,000
    0.55 AC lot

    Commercially zoned parcel with water available and public sewer access for future development.

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    Off-Market Properties in East Islip, NY

    Consider similar Off-Market properties in East Islip, NY. You may contact the owners directly to inquire about their potential intentions to sell. To help you make a strong first impression, we can assist by reaching out to these owners with compelling proposals created using our AI tool.

    1 Jackson St
    OFFICE BUILDING

    1 Jackson St, East Islip, NY 11730

    $1,150,000
    Estimated value
    0.34 AC lot
    View details
    369 Main St
    OFFICE BUILDING

    369 Main St, East Islip, NY 11730-2800

    $475,000
    Estimated value
    0.04 AC lot
    View details
    369 Main St
    OFFICE BUILDING

    369 Main St, East Islip, NY 11730-2800

    $280,000
    Estimated value
    0.03 AC lot
    View details
    369 Main St
    OFFICE BUILDING

    369 Main St, East Islip, NY 11730-2800

    $490,000
    Estimated value
    0.02 AC lot
    View details
    79-83 Main St
    PROFESSIONAL BUILDING

    79-83 Main St, East Islip, NY 11730

    $335,000
    Estimated value
    0.37 AC lot
    View details
    88 Main St
    OFFICE BUILDING

    88 Main St, East Islip, NY 11730-2528

    $745,000
    Estimated value
    0.23 AC lot
    View details
    96 Main St
    OFFICE BUILDING

    96 Main St, East Islip, NY 11730-2531

    $260,000
    Estimated value
    0.45 AC lot
    View details
    Main St
    OFFICE BUILDING

    Main St, East Islip, NY 11730

    $290,000
    Estimated value
    0.16 AC lot
    View details
    45 Main St
    PROFESSIONAL BUILDING

    45 Main St, East Islip, NY 11730-2502

    $225,000
    Estimated value
    0.74 AC lot
    View details
    268 Main St
    PROFESSIONAL BUILDING

    268 Main St, East Islip, NY 11730-2835

    $235,000
    Estimated value
    0.26 AC lot
    View details
    149 Main St
    OFFICE BUILDING

    149 Main St, East Islip, NY 11730-2644

    $255,000
    Estimated value
    0.25 AC lot
    View details
    167 Main St
    PROFESSIONAL BUILDING

    167 Main St, East Islip, NY 11730-2602

    $235,000
    Estimated value
    0.23 AC lot
    View details
    200 Carleton Ave
    OFFICE BUILDING

    200 Carleton Ave, East Islip, NY 11730-1222

    $235,000
    Estimated value
    1.55 AC lot
    View details
    228 Main St
    PROFESSIONAL BUILDING

    228 Main St, East Islip, NY 11730-2711

    $235,000
    Estimated value
    0.35 AC lot
    View details
    216 Carleton Ave
    PROFESSIONAL BUILDING

    216 Carleton Ave, East Islip, NY 11730-1222

    $230,000
    Estimated value
    0.43 AC lot
    View details
    8 Laurel Ave
    PROFESSIONAL BUILDING

    8 Laurel Ave, East Islip, NY 11730-2131

    $210,000
    Estimated value
    0.76 AC lot
    View details
    107 Main St
    PROFESSIONAL BUILDING

    107 Main St, East Islip, NY 11730-2337

    $245,000
    Estimated value
    0.32 AC lot
    View details
    74 Carleton Ave
    PROFESSIONAL BUILDING

    74 Carleton Ave, East Islip, NY 11730-2109

    $235,000
    Estimated value
    0.18 AC lot
    View details
    3045 Sunrise Hwy
    OFFICE BUILDING

    3045 Sunrise Hwy, East Islip, NY 11730

    $255,000
    Estimated value
    1.14 AC lot
    View details
    137 Main St
    PROFESSIONAL BUILDING

    137 Main St, East Islip, NY 11730-2601

    $235,000
    Estimated value
    0.33 AC lot
    View details

    East Islip, NY Office Buildings Market Trends and Statistics

    Explore 44 office buildings for sale in East Islip, NY, showcased through 4 active listings on our real estate platform. These investment opportunities span a total of 6,100 square feet of properties for sale, with an estimated market value of $4,900,000.

    Sale prices for office properties in East Islip, NY start at $800,000, averaging $1,225,000, and reaching up to $1,650,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

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    Top Commercial Asset Segments

    Commercial property segments ranked by active listings on the market

    Medical Office Space 5
    Office buildings 4
    Office Units 4

    Demographics Overview

    Population 14K
    Population Growth (5Y) +3.7%
    Median Household Income $146,190
    College Educated 56.6%

    High-Yield Neighborhoods for Investment

    Identify East Islip submarkets with the highest inventory density on the market and evaluate the average listing prices of real estate assets

    Neighborhood Average Price
    11730 $1.3M

    Listings Trend

    New vs delisted commercial listings in Suffolk County

    New Delisted

    Total CRE Inventory on Market (SF)

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