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    Suffolk County, NY Duplexes for Sale

    35 results
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    Amityville Legal Two-Family Home
    $699,999
    0.44 Acres

    Amityville Legal Two-Family Home

    75 Oak St, Amityville, NY 11701

    Legal two-family home in Amityville, close to amenities.

    • Legal 2‑family house by permit
    • Large lot - shy of half an acre, with room for a pool
    • Features 5 bedrooms and 2 full baths
    • Convenient location: Across from Peterkin Park, close to shops, major highways, and schools
    • First floor bedroom
    Updated: Feb 20
    View details
    Hauppauge Legal Two-Family Duplex
    Pending
    $799,999
    2,416 SF

    Hauppauge Legal Two-Family Duplex

    11 Marlo Ln, Hauppauge, NY 11788

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

    • Rare legal two‑family duplex in the desirable Hauppauge School District.
    • Two separate units, each with chef's kitchens, hardwood floors, and private outdoor patio space.
    • Significant value‑add opportunity with below‑market rents ($2,400/$2,300) and tenants in place.
    • First‑floor unit features three bedrooms and access to a partially finished basement with a full bathroom and separate entrance.
    • Second‑floor unit boasts fresh paint, updated spa‑like bathroom, abundant closet space, and custom molding.
    Updated: Jan 22
    View details
    Patchogue Legal Two-Family Residence
    Pending
    $550,000
    0.08 Acres

    Patchogue Legal Two-Family Residence

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

    13 Academy St, Patchogue, NY 11772
    View details
    East Quogue Multi-Family Residence
    $1,195,000
    1,700 SF

    East Quogue Multi-Family Residence

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

    13 Willow Shade Ave, East Quogue, NY 11942
    View details
    Colonial Duplex in Prime Location
    $1,475,000
    3,900 SF

    Colonial Duplex in Prime Location

    Spacious Colonial duplex on 1.24 acres in Riverhead, NY.

    250 Main Rd, Riverhead, NY 11901
    View details
    Renovated Multi-Family Property, East Marion
    Pending
    $899,000
    0.40 Acres

    Renovated Multi-Family Property, East Marion

    Completely renovated two-family property on a large lot.

    7600 Main Rd, East Marion, NY 11939
    View details
    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 St, East Islip, NY 11730
    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 Rd, Westhampton Dunes, NY 11978
    View details
    Amityville Legal Two-Family Home
    Pending
    $949,000
    0.16 Acres

    Amityville Legal Two-Family Home

    Legal two-family home in Amityville with income potential.

    168 Oldfield Ave, Amityville, NY 11701
    View details
    Sound Beach Legal Two-Family Home
    Pending
    $699,000
    0.18 Acres

    Sound Beach Legal Two-Family Home

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

    64 Eastport Dr, 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 St, Riverhead, NY 11901
    View details
    West Babylon Two-Family Home
    Pending
    $674,990
    0.23 Acres

    West Babylon Two-Family Home

    Legal two-family home with large yard in West Babylon.

    1558 9Th St, West Babylon, NY 11704
    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 Ave, Southampton, NY 11968
    View details
    Riverhead Duplex with Rental Income
    $679,988
    2,750 SF

    Riverhead Duplex with Rental Income

    Two-family home in Riverhead, currently generating rental income.

    418 Lincoln St, Riverhead, NY 11901
    View details
    Well-Maintained Lindenhurst Two-Family Residence
    Pending
    $499,999
    1,470 SF

    Well-Maintained Lindenhurst Two-Family Residence

    Legal two-family home with income potential near schools and transportation.

    61 Kellum St, North Lindenhurst, NY 11757
    View details
    Updated Duplex in Islip, NY
    Pending
    $599,999
    1,542 SF

    Updated Duplex in Islip, NY

    Updated two-family home in Islip with income potential.

    25 1St St, Islip, NY 11751
    View details
    Turnkey Legal 2-Family Home
    Pending
    $599,000
    2,124 SF

    Turnkey Legal 2-Family Home

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

    62 N 16Th St, Wyandanch, NY 11798
    View details
    Bay Shore Legal Duplex
    Pending
    $599,000
    1,755 SF

    Bay Shore Legal Duplex

    Well-maintained legal 2-family residence in a desirable neighborhood.

    44 Chapman Pl, Bayshore, NY 11706
    View details
    Wheatley Heights Legal Two-Family Home
    Pending
    $639,000
    2,044 SF

    Wheatley Heights Legal Two-Family Home

    Legal two-family home in Wheatley Heights, steps to LIRR.

    35 N 16Th St, Wheatley Heights, NY 11798
    View details
    Income-Producing Multi-Family Property
    $1,699,000
    2,919 SF

    Income-Producing Multi-Family Property

    Multi-family property with two residences, gardens, and potential income.

    153 Ponquogue Ave, Hampton Bays, NY 11946
    View details
    Copiague Duplex with Detached Garage
    Pending
    $650,000
    1,216 SF

    Copiague Duplex with Detached Garage

    Legal duplex near shopping, dining, and train station in Copiague.

    225 Oak St, Copiague, NY 11726
    View details
    Renovated Duplex in The Woodlands
    $389,000

    Renovated Duplex in The Woodlands

    Two-bedroom duplex in meticulously maintained community with upcoming renovations.

    128 Cardinal Ln, Islip, NY 11751
    View details
    East Quogue Two-Family Home
    $829,999

    East Quogue Two-Family Home

    Two-family home on .72 acre lot in East Quogue.

    67 Old Country Rd, East Quogue, NY 11942
    View details
    Wyandanch Legal Two-Family Residence
    $629,000

    Wyandanch Legal Two-Family Residence

    Legal two-family home near transportation and highways.

    10 Spruce St, Wyandanch, NY 11798
    View details

    Suffolk County, NY Duplexes Investment Opportunities Market Analysis

    Explore 35 duplexes for sale in Suffolk County, NY, showcased through 35 active listings on our real estate platform. These investment opportunities span a total of 251,206 square feet of properties for sale, with an estimated market value of $17,125,986.

    Sale prices for duplexes in Suffolk County, NY start at $499,999, averaging $901,367, and reaching up to $2,300,000 — 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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