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    Nassau County, NY Duplexes for Sale

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    139 properties
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    Duplex Property with Finished Basement
    Updated: Aug 14
    Duplex Property with Finished Basement

    1537 Madison Street, Elmont, NY 11003

    $879,000
    1,270 sqft 0.10 AC lot
    1,270 SF wood‑frame duplex property built in 1954
    0.1047‑acre lot with private driveway and detached garage
    Three bedrooms and three bathrooms
    Finished basement with laundry, recreation, and bonus space
    Rear deck, pool, and front patio
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    Two-Unit Duplex with Separate Laundry
    Updated: Oct 15
    Two-Unit Duplex with Separate Laundry

    54 Marwood Road N, Port Washington, NY 11050

    $1,099,000
    0.10 AC lot
    Two apartments, each with its own laundry
    First‑floor unit includes 2 bedrooms, 2 full baths, a den or office, and a recreation room
    Second‑floor apartment has 2 bedrooms, a full bath, a living room, and an eat‑in kitchen
    0.1033‑acre lot with driveway and deck
    Separate gas meters for natural‑gas heating
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    Renovated Two-Family Duplex
    Renovated Two-Family Duplex

    5 Linwood Road N, Port Washington, NY 11050

    $1,989,000
    0.11 AC lot

    Fully updated residential income property with hardwood floors, central air, in-unit laundry, and off-street parking.

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    Mixed-Use Property with Warehouse
    Mixed-Use Property with Warehouse

    6-8 Chadwick Street, Glen Cove, NY 11542

    $4,500,000
    8,884 sqft 0.69 AC lot

    Five structures combine commercial space, residential units, secured yard area, and separate utility metering.

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    Renovated Two-Family Duplex
    Renovated Two-Family Duplex

    7 Linwood Road N, Port Washington, NY 11050

    $1,949,000
    0.11 AC lot

    Legal two-family residence with finished basement storage, hardwood floors, central air, and off-street parking.

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    Updated Two-Family Duplex
    Updated Two-Family Duplex

    61 1st Avenue, East Rockaway, NY 11518

    $1,399,000
    0.17 AC lot

    A legal two-family residence pairs radiant heat with central air and multiple flexible recreation areas.

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    Two-Unit Duplex with Separate Entrances
    Two-Unit Duplex with Separate Entrances

    12 Beech Court, Glen Cove, NY 11542

    $779,000
    0.18 AC lot

    Distinct heating systems and electric meters serve the two residences.

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    Mixed-Use Property with Renovated Offices
    Mixed-Use Property with Renovated Offices

    1168-1170 Port Washington Boulevard Unit: 1168-1170, Port Washington, NY 11050

    $1,700,000
    6,912 sqft

    The property combines retail frontage, office accommodations, and a separate two-family residence on one lot.

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    Two-Unit Duplex with Private Terrace
    Two-Unit Duplex with Private Terrace

    34 Meyer Avenue, Valley Stream, NY 11580

    $864,000
    0.10 AC lot

    Both residences have two bedrooms, separate living and dining rooms, and eat-in kitchens.

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    Legal Two-Family Duplex with Garage
    Legal Two-Family Duplex with Garage

    81 Franklin Street, Elmont, NY 11003

    $989,888
    0.11 AC lot

    Cape Cod duplex with separate living spaces, a finished basement, private parking, and public utilities.

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    Two-Unit Duplex with Separate Meters
    Two-Unit Duplex with Separate Meters

    12 Beech Court, Glen Cove, NY 11542

    $779,000
    2,334 sqft

    Each residence has an independent entrance, heating system, and electric meter.

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    Renovated Duplex with Balcony
    Renovated Duplex with Balcony

    101 Firwood Road, Port Washington, NY 11050

    $880,000
    0.10 AC lot

    Two-family property with gas heat, hardwood floors, separate utility meters, and public water and sewer.

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    Two-Family Home with Garage
    Two-Family Home with Garage

    550 E Harrison Street, Long Beach, NY 11561

    $1,850,000
    0.09 AC lot

    Each level has a kitchen and balcony, with a fenced backyard and private driveway.

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    Renovated Duplex With Detached Cottage
    Renovated Duplex With Detached Cottage

    77 Jefferson Avenue, Roslyn Heights, NY 11577

    $2,249,000
    3,593 sqft

    Includes a renovated primary residence and a separate cottage with private outdoor space.

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    2-Unit Duplex
    2-Unit Duplex

    36 Gordon Road, Valley Stream, NY 11581

    $699,999
    0.09 AC lot

    Two separate residences offer central air conditioning, full kitchens, and in-unit laundry appliances.

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    Two-Family Duplex with Large Yard
    Two-Family Duplex with Large Yard

    684 Newton Avenue, Uniondale, NY 11553

    $658,000
    0.12 AC lot

    Two-family property with separate living arrangements, original architectural details, and an expansive paved driveway.

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    Renovated Duplex with Pool
    Renovated Duplex with Pool

    193 Frederick Ave, South Floral Park, NY 11001

    $1,290,000
    2,785 sqft 0.17 AC lot

    Legal two-family duplex with updated interiors, separate floor layouts, an in-ground pool, and a two-car garage.

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    Duplex With Detached Garage
    Duplex With Detached Garage

    569 Greenway E, West Hempstead, NY 11552

    $810,000
    0.12 AC lot

    Two residential units offer separate entrances, while the finished basement includes a private walk-out.

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    Renovated Two-Family Duplex
    Renovated Two-Family Duplex

    7 Linwood Road N, Port Washington, NY 11050

    $1,949,000
    2,800 sqft

    Fully renovated duplex with two residential units and finished-basement storage.

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    Legal Two-Family Duplex
    Legal Two-Family Duplex

    15 Lexington Avenue, Westbury, NY 11590

    $899,000
    0.15 AC lot

    Brick-and-vinyl-sided duplex with updated kitchens and baths, a finished walk-out basement, garage, driveway, and fenced yard.

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    Two-Unit Duplex Property
    Two-Unit Duplex Property

    27 & 31 Kennedy Road, East Hills, NY 11577

    $1,200,000
    1,672 sqft

    Tenant-occupied duplex with month-to-month leases, private yards, and flexible unit configurations.

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    Duplex with Private Garage
    Duplex with Private Garage

    8 Saint Nicholas Street, Lynbrook, NY 11563

    $719,900
    0.11 AC lot

    The upper apartment has one bedroom, while the first-floor residence includes an office and access to a rear porch.

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    Two-Family Brick Duplex
    Two-Family Brick Duplex

    262-08 86th Avenue, Floral Park, NY 11001

    $1,150,000
    2,228 sqft

    An upper-floor residence and finished basement add distinct living and work areas to the home's main floor.

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    Duplex with Finished Basement
    Duplex with Finished Basement

    254 Hempstead Avenue, Rockville Centre, NY 11570

    $1,200,000
    0.34 AC lot

    Two-family property with separate entrances, multiple finished living levels, and a private driveway in Rockville Centre.

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    Nassau County, NY Duplexes Market Trends and Statistics

    Explore 139 duplexes for sale in Nassau County, NY, showcased through 139 active listings on our real estate platform. These investment opportunities span a total of 37,113 square feet of properties for sale, with an estimated market value of $150,062,007.

    Sale prices for two-family homes in Nassau County, NY start at $540,000, averaging $1,079,582, and reaching up to $4,500,000 — 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 Nassau County Real Estate Agencies

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

    Charles Rutenberg Realty, Inc.
    255 Executive Drive, Suite 104 Hicksville, NY 11803
    Phone: 15165757500
    www.crrli.com
    Laffey Real Estate
    55 Northern Blvd., East Hills, NY 11548
    Phone: 18882896902
    www.laffey.com
    Laffey International Realt Estate
    193 Hillside Avenue Williston Park, NY 11596
    Phone: 18007741462
    www.bhhslaffey.com
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