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    Suffolk County, NY Duplexes for Sale

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    Brooklyn, NY Queens, NY New York, NY
    24 results
    Mount Sinai Legal Two-Family Home
    $779,000
    0.50 Acres

    Mount Sinai Legal Two-Family Home

    232 N Country Road, Mount Sinai, NY 11766

    Legal two-family home in Mount Sinai with updated features.

    • Legal 2‑family property with main house and separate studio cottage.
    • Main house features 3‑4 bedrooms, 2 full bathrooms, and updated eat‑in kitchen.
    • Cottage includes a full kitchen, loft, and separate washer/dryer.
    • Ductless AC units in all rooms of the main house.
    • Ample parking space in driveway.
    Updated: Mar 5
    View details
    Lindenhurst Legal Two-Family Home
    $599,999

    Lindenhurst Legal Two-Family Home

    183 S 7th Street, Lindenhurst, NY 11757

    Legal two-family home in Lindenhurst Village, excellent income opportunity.

    • Legal 2 Family by C/O in Lindenhurst Village
    • Excellent income‑producing opportunity
    • Delivered vacant
    • Full finished basement with separate outside entrance and full bath
    • Updated gas boiler and hot water heater with efficient 3 zone heating
    Updated: Apr 16
    View details
    Hauppauge Legal Two-Family Duplex
    $799,999
    0.38 Acres

    Hauppauge Legal Two-Family Duplex

    Legal two-family duplex in Hauppauge School District with value-add opportunity.

    11 Marlo Lane, Hauppauge, NY 11788
    View details
    Amityville Legal Two-Family House
    $699,999
    0.44 Acres

    Amityville Legal Two-Family House

    Legal two-family house with five bedrooms and two full baths.

    75 Oak Street, Amityville, NY 11701
    View details
    Bayfront Multifamily Cottage in Westhampton
    $3,950,000
    2,174 SF

    Bayfront Multifamily Cottage in Westhampton

    Multifamily property with bay views, guest cottage, and beach access.

    654A Dune Road, Westhampton Dunes, NY 11978
    View details
    Renovated Multi-Family Property, East Marion
    $899,000
    0.40 Acres

    Renovated Multi-Family Property, East Marion

    Completely renovated two-family property on a large lot.

    7600 Main Road, East Marion, NY 11939
    View details
    Colonial Duplex in Prime Location
    $1,295,000
    1.24 Acres

    Colonial Duplex in Prime Location

    Spacious Colonial duplex on 1.24 acres in Riverhead, NY.

    250 Main Road, Riverhead, NY 11901
    View details
    Lindenhurst Two-Family Home For Sale
    $715,000
    0.18 Acres

    Lindenhurst Two-Family Home For Sale

    Legal two-family residence with income potential in Lindenhurst, NY.

    449 S 1st Street, Lindenhurst, NY 11757
    View details
    Two Homes on Large Lot
    $899,999
    0.75 Acres

    Two Homes on Large Lot

    Two homes on one property near train station.

    77 N Phillips Avenue, Speonk, NY 11972
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    Two-Family Residence Near Railroad
    $799,000
    0.25 Acres

    Two-Family Residence Near Railroad

    Two identical residences close to shopping and the train station.

    73-75 Washington Street, East Islip, NY 11730
    View details
    Turnkey Legal Two-Family Home
    $729,000
    0.17 Acres

    Turnkey Legal Two-Family Home

    Legal 2-family home in Wyandanch generating strong, guaranteed income.

    39 N 16th Street, Wyandanch, NY 11798
    View details
    Historic Colonial Estate with Two Houses
    $995,000
    1.00 Acre

    Historic Colonial Estate with Two Houses

    Versatile estate in East Moriches with endless possibilities.

    428 Montauk Highway, East Moriches, NY 11940
    View details
    Sound Beach Legal Two-Family Home
    $699,000
    0.18 Acres

    Sound Beach Legal Two-Family Home

    Legal two-family home near the water, ideal for investors.

    64 Eastport Drive, Sound Beach, NY 11789
    View details
    Riverhead Two-Family Home For Sale
    $799,000
    0.12 Acres

    Riverhead Two-Family Home For Sale

    Two-family home in Riverhead with existing rental income.

    418 Lincoln Street, Riverhead, NY 11901
    View details
    Greenport Legal Two-Family Home
    $1,297,000
    0.12 Acres

    Greenport Legal Two-Family Home

    Two-family home in Greenport Village near restaurants, shopping, and transportation.

    407 Wiggins Street, Greenport, NY 11944
    View details
    Greenport Legal Two-Family Property
    $1,297,000
    0.12 Acres

    Greenport Legal Two-Family Property

    Two-family property in Greenport, NY, near local amenities.

    401 Wiggins Street, Greenport, NY 11944
    View details
    Patchogue Two-Family Home For Sale
    $625,000
    0.17 Acres

    Patchogue Two-Family Home For Sale

    Legal two-family home near train, downtown, beaches, and shopping.

    19 Academy Street, Patchogue, NY 11772
    View details
    East Quogue Multi-Family Residence
    $1,149,000
    0.15 Acres

    East Quogue Multi-Family Residence

    Updated multi-family residence near Shinnecock Bay in East Quogue.

    13 Willow Shade Avenue, East Quogue, NY 11942
    View details
    Renovated Multifamily Property, Kings Park
    $1,200,000

    Renovated Multifamily Property, Kings Park

    Renovated multifamily property in Kings Park, great investment opportunity.

    50 Pulaski Road, Kings Park, NY 11754
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    Patchogue Legal Two-Family Residence
    $550,000
    0.08 Acres

    Patchogue Legal Two-Family Residence

    Legal two-family property in Patchogue Village, New York.

    13 Academy Street, Patchogue, NY 11772
    View details
    Medford Commercial Properties For Sale
    $6,500,000
    1.65 Acres

    Medford Commercial Properties For Sale

    Three adjacent commercial properties totaling 4 acres in Medford, NY.

    3120 Route 112, Medford, NY 11763
    View details
    Southampton Village Multifamily Opportunity
    $2,300,000
    0.33 Acres

    Southampton Village Multifamily Opportunity

    Two-family home in the heart of Southampton Village.

    39 Halsey Avenue, Southampton, NY 11968
    View details
    Four Acre Commercial Property
    $6,500,000
    19,500 SF

    Four Acre Commercial Property

    Three adjacent properties totaling four acres for sale.

    3120 Route 112, Medford, NY 11763
    View details
    Mattituck Mixed-Use Investment Opportunity
    $1,795,000
    3,610 SF

    Mattituck Mixed-Use Investment Opportunity

    Commercial property with retail space and residential income potential.

    13100 Main Road, Mattituck, NY 11952
    View details
    Based on your search, we've compiled Potential Opportunities for your consideration. Besides 24 Active Listings in Suffolk County, NY

    Suffolk County, NY Duplexes Investment Opportunities Market Analysis

    Explore 24 duplexes for sale in Suffolk County, NY, showcased through 24 active listings on our real estate platform. These investment opportunities span a total of 382,797 square feet of properties for sale, with an estimated market value of $27,776,997.

    Sale prices for duplexes in Suffolk County, NY start at $550,000, averaging $1,388,849, and reaching up to $6,500,000 — 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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