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    Suffolk County, NY Duplexes for Sale

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    Two-Unit Duplex with Basement
    Updated: Sep 2
    Two-Unit Duplex with Basement

    544 Park Avenue, Centereach, NY 11720

    $649,990
    0.22 AC lot
    Two distinct living areas, including a separate two‑bedroom upper apartment
    0.22‑acre lot with private driveway, ample parking, and backyard
    Full unfinished basement provides additional storage space
    Three electric meters: one on each floor and one for the basement
    Two oil burners and oil tanks
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    Two-Unit Duplex with Garage Access
    Updated: Oct 9
    Two-Unit Duplex with Garage Access

    118 Liberty Street, Deer Park, NY 11729

    $849,000
    0.29 AC lot
    Two residential units with five bedrooms total
    First‑floor unit includes three bedrooms, an updated kitchen, and in‑unit laundry
    Upper‑level unit has two bedrooms and additional living space
    Direct garage access from the first‑floor unit
    Full basement with an outside entrance
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    Two-Family Duplex with Warehouse Space
    Two-Family Duplex with Warehouse Space

    74 W Hoffman Avenue, Lindenhurst, NY 11757

    $899,000
    0.11 AC lot

    Residential units are paired with rear office and warehouse areas across two levels.

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    Two-Unit Residential Income Duplex
    Two-Unit Residential Income Duplex

    17 Crescent Dr, Huntington, NY 11743

    $1,200,000
    1,800 sqft 0.56 AC lot

    Two 2BR/2B units on a 0.56-acre parcel, offered for sale in Huntington Village.

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    Duplex with Finished Basement
    Duplex with Finished Basement

    180 N 7th Street, Lindenhurst, NY 11757

    $849,000
    0.17 AC lot

    The two-family layout includes one three-bedroom residence and a separate two-bedroom residence.

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    Commercial Land with Existing Improvements
    Commercial Land with Existing Improvements

    97 Carleton Avenue, Islip Terrace, NY 11752

    $899,998
    0.46 AC lot

    The parcel includes a two-family residence and a detached garage finished as recreation space.

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    2-Unit Cape Cod Duplex
    2-Unit Cape Cod Duplex

    35 Ward Avenue, Northport, NY 11768

    $899,000
    0.17 AC lot

    Two rentable residences offer separate outdoor areas and off-street parking, with seasonal water views.

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    Two-Unit Duplex with Detached Garage
    Two-Unit Duplex with Detached Garage

    21 Locust Ave, Amityville, NY 11701

    $799,000
    2,086 sqft

    Permitted two-family configuration includes separate utilities, a tenant-occupied secondary residence, and finished basement space.

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    Two-Family Duplex with Separate Utilities
    Two-Family Duplex with Separate Utilities

    31 Crooked Hill Road, Huntington, NY 11743

    $1,499,000
    0.23 AC lot

    Two rented units share a foyer and basement storage with individual laundry centers.

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    Two-Home Duplex Property
    Two-Home Duplex Property

    33 Locust Avenue, Southampton, NY 11968

    $999,999
    0.46 AC lot

    Legal two-family property with separate ranch residences, basement space, driveway parking, and renovation needs.

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    Victorian Home on Large Lot
    Victorian Home on Large Lot

    38 Park Ave, Babylon, NY 11702

    $1,635,000
    0.42 AC lot

    Two-family home with potential for additional rental units.

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    Duplex with Updated Kitchens
    Duplex with Updated Kitchens

    458 N Magee Street, Southampton, NY 11968

    $1,500,000
    0.18 AC lot

    Corner-lot property with two living areas, quartz counters, stainless appliances, and a full unfinished basement.

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    Corner-Lot Duplex
    Corner-Lot Duplex

    21 Locust Avenue, Amityville, NY 11701

    $799,000
    0.36 AC lot

    Two residential units include finished basements, separate utilities, and a detached garage.

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    Mixed-Use Retail Property
    Mixed-Use Retail Property

    16500 Main St, New Suffolk, NY 11956

    Contact for pricing
    3,610 sqft

    Retail space is paired with two leased apartments, creating a combined commercial and residential configuration.

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    Renovated Two-Family Property
    Renovated Two-Family Property

    47 Bushwick Avenue, Brentwood, NY 11717

    $1,348,000
    0.68 AC lot

    Two-unit residence with updated kitchens, central air, driveway parking, and expansive outdoor space on a 0.68-acre parcel.

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    Beachfront Community Duplex
    Beachfront Community Duplex

    5 Woodcliff Trail, Baiting Hollow, NY 11933

    $399,990
    0.12 AC lot

    Seasonal duplex with water views, dual kitchens, outdoor entertaining areas, and beach access in Woodcliff Park.

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    Two-Home Duplex Property
    Two-Home Duplex Property

    15-17 Park Woods Ln, Kings Park, NY 11754

    $1,625,000
    1.00 AC lot

    Legal two-family property with separate residences, an in-ground pool, and landscaped outdoor space.

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    Duplex with Two-Story Barn
    Duplex with Two-Story Barn

    1220 Youngs Avenue, Southold, NY 11971

    $1,249,000
    0.46 AC lot

    HB-zoned duplex with a refurbished accessory barn, planted field, and walkable access to local services.

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    Two-Unit Duplex with Private Driveway
    Two-Unit Duplex with Private Driveway

    21 Carleton Ave, East Islip, NY 11730

    $799,000

    Separate boilers and split HVAC systems serve the residences, while the driveway accommodates multiple vehicles.

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    Two-Unit Duplex with Outdoor Space
    Two-Unit Duplex with Outdoor Space

    401 Wiggins Street, Greenport, NY 11944

    $1,297,000
    0.12 AC lot

    Two separate two-bedroom residences provide flexibility for occupancy and rental use.

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    Business-District Development Parcel
    Business-District Development Parcel

    97 Carleton Ave, Islip Terrace, NY 11752

    $899,998

    A two-family dwelling and converted garage occupy a business-zoned parcel near two rail stations.

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    Two-Unit Duplex with Garage
    Two-Unit Duplex with Garage

    407 Wiggins Street, Greenport, NY 11944

    $1,297,000
    0.12 AC lot

    Both legal residences contain two bedrooms, and the property includes several outdoor living areas.

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    Two-Unit Duplex with Garage
    Two-Unit Duplex with Garage

    407 Wiggins Street, Greenport, NY 11944

    $1,297,000

    Two distinct residences offer a residential income configuration with outdoor living areas and a detached-use garage.

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    Duplex with Separate Utility Systems
    Duplex with Separate Utility Systems

    22-24 Conifer Court, Northport, NY 11768

    $979,000
    0.24 AC lot

    Two three-bedroom residences share only water service, with individual electric meters, oil tanks, and central air equipment.

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    Suffolk County, NY Duplexes Market Trends and Statistics

    Explore 42 duplexes for sale in Suffolk County, NY, showcased through 42 active listings on our real estate platform. These investment opportunities span a total of 8,696 square feet of properties for sale, with an estimated market value of $44,593,960.

    Sale prices for two-family homes in Suffolk County, NY start at $399,990, averaging $1,087,657, 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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    Featured Suffolk County Real Estate Agencies

    Realmo connects you with licensed Suffolk County CRE brokers providing property specifications, local market pricing, and commercial transaction underwriting support.

    Realty Connect USA
    35 Arkay Dr Hauppauge, NY 11788
    Phone: 16318815160
    www.realtyconnectusa.com
    JMRENY
    52 Broadway, Suite 1 Greenlawn, NY 11740
    Phone: 15166547355
    www.jmreny.com
    Eric G. Ramsay Jr. Associate LLC
    236 West Main St Bayshore, NY 11706
    Phone: 16316651500
    www.ramsayrealtors.com
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