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    Suffolk County, NY Duplexes for Sale

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    Brooklyn, NY New York, NY Bronx, NY
    29 results
    Legal Two-Family Home in Sinai
    $779,000
    1,900 SF

    Legal Two-Family Home in Sinai

    232 N Country Road, Mount Sinai, NY 11766

    Two-family home with main house and cottage in Mount Sinai.

    • Legal 2‑family property in Mount Sinai, ideal for rental income or multi‑generational living.
    • Main house boasts 3‑4 bedrooms, 2 full bathrooms, updated kitchen, and over 1900 sqft of living space.
    • Separate studio cottage features a loft, full kitchen, its own washer/dryer, cesspool, and propane tank.
    • Enjoy ductless AC units in all rooms of the main house.
    • Ample parking space in the driveway.
    Updated: Mar 5
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    Income-Producing Duplex in East Islip
    $895,000
    0.52 Acres

    Income-Producing Duplex in East Islip

    66-68 Hawthorne, East Islip, NY 11730

    Well-maintained duplex with income potential, close to amenities.

    • Income‑producing duplex: Ideal for investors or owner‑occupants.
    • Each unit features 3 bedrooms, spacious living room, formal dining area, and eat‑in kitchen.
    • Each unit has its own private garage.
    • Oversized lot provides ample outdoor space.
    • Convenient location: Close to shopping, dining, and everyday conveniences.
    Updated: May 29
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    Two Homes, Southampton Opportunity
    $1,199,999
    0.46 Acres

    Two Homes, Southampton Opportunity

    Two detached homes on a single lot in Southampton.

    33 Locust Avenue, Southampton, NY 11968
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    Renovated Two-Family Home
    $999,999
    0.23 Acres

    Renovated Two-Family Home

    Legal two-family home with modern finishes and income potential.

    54 Evergreen Street, West Babylon, NY 11704
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    Victorian Multifamily with Flexible Zoning
    $959,000
    0.62 Acres

    Victorian Multifamily with Flexible Zoning

    Two income-producing homes on a park-like site with DC-3 flexibility for residential and commercial options.

    761 E Main Street, Riverhead, NY 11901
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    Southold Two-Family Home with Barn
    $1,295,000
    0.46 Acres

    Southold Two-Family Home with Barn

    Legal two-family home with a repurposed barn and planting field.

    1220 Youngs Avenue, Southold, NY 11971
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    Huntington Station Duplex For Sale
    $899,988
    0.28 Acres

    Huntington Station Duplex For Sale

    Legal duplex with income potential in Huntington Station location.

    41-43 Evert Street, Huntington Station, NY 11746
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    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
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    Islip Legal Two-Family House
    $550,000
    0.14 Acres

    Islip Legal Two-Family House

    Legal two-family house in Islip, handyman special, income potential.

    23 Robbins Avenue, Islip, NY 11751
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    Colonial-Style Duplex with Parking
    $1,250,000
    1.24 Acres

    Colonial-Style Duplex with Parking

    Colonial duplex with two income-producing units, 8 bedrooms, and 4 bathrooms, set on 1.24 acres with off-street parking.

    250 Main Road, Riverhead, NY 11901
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    Income-Producing Property with Two Homes
    $1,500,000
    2,919 SF

    Income-Producing Property with Two Homes

    Rare income-producing property with two homes and multiple gardens.

    153 Ponquogue Avenue, Hampton Bays, NY 11946
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    Legal Two-Family Home with Balcony
    $824,999

    Legal Two-Family Home with Balcony

    Well-maintained two-family residence with an oversized 2-car garage and updated systems, offering flexible living layout.

    517 Herzel Boulevard, West Babylon, NY 11704
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    Copiague Legal Detached Duplex
    $799,000
    0.17 Acres

    Copiague Legal Detached Duplex

    Legal duplex near shopping and dining in Copiague, NY.

    22 Beach Avenue, Copiague, NY 11726
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    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
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    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
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    Lindenhurst Legal Two-Family Home
    $599,999

    Lindenhurst Legal Two-Family Home

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

    183 S 7th Street, Lindenhurst, NY 11757
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    East Quogue Multi-Family Bay Residence
    $1,099,000
    1,700 SF

    East Quogue Multi-Family Bay Residence

    Updated multi-family residence near Shinnecock Bay with water views.

    13 Willow Shade Avenue, East Quogue, NY 11942
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    Medford Commercial Properties For Sale
    $6,500,000
    19,500 SF

    Medford Commercial Properties For Sale

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

    3120 Route 112, Medford, NY 11763
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    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
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    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
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    Colonial Home with Five Bedrooms
    $760,000
    0.17 Acres

    Colonial Home with Five Bedrooms

    Colonial home featuring five bedrooms and a two-car garage.

    129 N 7th Street, Lindenhurst, NY 11757
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    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
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    Renovated Multifamily Property, Kings Park
    $1,150,000

    Renovated Multifamily Property, Kings Park

    Renovated multifamily property in Kings Park, great investment opportunity.

    50 Pulaski Road, Kings Park, NY 11754
    View details

    Suffolk County, NY Duplexes Investment Opportunities Market Analysis

    Explore 29 duplexes for sale in Suffolk County, NY, showcased through 29 active listings on our real estate platform. These investment opportunities span a total of 58,384 square feet of properties for sale, with an estimated market value of $24,307,000.

    Sale prices for duplexes in Suffolk County, NY start at $779,000, averaging $2,700,777, 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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