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    East Islip, NY Office Spaces for Sale

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    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
    Medical Office with Basement
    Updated: Apr 29
    Medical Office with Basement

    3250 Sunrise Highway, East Islip, NY 11730

    $699,999
    0.31 AC lot
    Medical office layout with three private exam rooms, reception, waiting, lab, and physician office areas
    Full basement with stairwell access for storage, expansion, or operational use
    0.31‑acre property built in 1972
    Located on Sunrise Highway in East Islip
    ADA‑compliant features include an accessible ramp, designated handicap parking, and handicap‑accessible bathroom
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    Multi-Tenant Office Building with 7 Offices
    Multi-Tenant Office Building with 7 Offices

    128 Carleton Avenue, East Islip, NY 11730

    $800,000
    0.28 AC lot

    Renovated multi-tenant office building with seven private offices, conference room, and detached storage garage in GMT zoning.

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    Office Condominium with Private Offices
    Office Condominium with Private Offices

    369 E Main Street, East Islip, NY 11730

    $319,000
    0.02 AC lot

    Configured for professional use with reception, meeting, private office, storage, and restroom areas.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Office Unit With Private Offices
    Office Unit With Private Offices

    369 E Main Street, East Islip, NY 11730

    $319,000
    1,000 sqft

    Approximately 1,000 square feet with reception, conference, storage, and dedicated restroom areas in a professional condominium complex.

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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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    Medical Office with Exam Rooms
    Medical Office with Exam Rooms

    3250 Sunrise Highway, East Islip, NY 11730

    $699,999
    0.31 AC lot

    Functional clinical layout with reception, waiting areas, private offices, lab, and dedicated staff access.

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    High-Visibility Commercial Property on Carleton Avenue
    High-Visibility Commercial Property on Carleton Avenue

    55 Carleton Ave, East Islip, NY 11730

    $1,650,000
    17,000 sqft 0.98 AC lot

    0.98-acre commercial property suited 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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    ADA-Compliant Medical Office Facility
    ADA-Compliant Medical Office Facility

    3250 Sunrise Highway, East Islip, NY 11730

    $699,999

    Turnkey medical office with ADA access, multiple waiting rooms, private exam rooms, and dedicated staff and patient entrances.

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    Based on your search, we've compiled 58 Potential Opportunities for your consideration. Besides 10 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.

    Live-Work Flex Building
    Live-Work Flex Building

    2163 Sunrise Highway, Islip, NY 11751

    $725,000
    0.18 AC lot

    Flexible live-work layout with B-1 commercial first floor and full residential accommodations upstairs.

    View details
    Medical Office For Sale
    Medical Office For Sale

    Bayshore, NY 11706

    $119,000

    Medical office featuring exam rooms, office, reception, and waiting areas.

    View details
    Medical Office Suite for Sale
    Medical Office Suite for Sale

    Bayshore, NY 11706

    $119,000

    Medical office suite includes three exam rooms, a reception area, waiting room, and two bathrooms.

    View details
    Renovated Mixed-Use Property Near LIRR
    Renovated Mixed-Use Property Near LIRR

    390 Moffitt Blvd, Islip, NY 11751

    Contact for pricing
    6,900 sqft

    Mixed-use property renovated in 2025, near Islip LIRR station.

    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.

    View details
    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.

    View details
    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.

    View details

    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

    East Islip, NY Office Spaces Market Trends and Statistics

    Explore 50 office spaces for sale in East Islip, NY, showcased through 10 active listings on our real estate platform. These investment opportunities span a total of 24,100 square feet of properties for sale, with an estimated market value of $9,287,997.

    Sale prices for office spaces in East Islip, NY start at $319,000, averaging $928,799, 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 4
    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 $1.2M

    Listings Trend

    New vs delisted commercial listings in Suffolk County

    New Delisted

    Total CRE Inventory on Market (SF)

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