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    Knox County, ME Duplexes for Sale

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    Portland, ME Lewiston, ME Bangor, ME Auburn, ME Augusta, ME Waterville, ME Biddeford, ME Rockland, ME
    17 properties
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    In-Town Two-Family Greek Revival
    Updated: Jun 19
    In-Town Two-Family Greek Revival

    77 Main Street, Rockport, ME 04856

    $1,125,000
    2,762 sqft 0.94 AC lot
    In‑town two‑family Greek Revival home built in 1890 with 2,762 SF of living space
    Ocean front waterfront feature; public water and public sewer service
    Two distinct units with separate entries and parking
    First‑floor unit has 1st floor bedroom and primary bedroom suite with bath; wood floors and high ceilings
    Upper unit includes kitchen and living room with bath/laundry on the second floor, plus two bedrooms on the third floor
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    Residential Income Property with In-Law Suite
    Updated: Jul 7
    Residential Income Property with In-Law Suite

    13 Sawpit Road, Appleton, ME 04862

    $379,900
    2,382 sqft 1.34 AC lot
    2023 contemporary 4‑bedroom home with 2.5 bathrooms, plus a private in‑law suite with separate entrance
    In‑law suite includes separate living space and a bathroom, supporting multigenerational living or rental use
    Approx. 1.3± acres with a mix of cleared yard and private wooded buffer for added privacy
    Private driveway and outdoor space with space for future gardening or expansion
    Utilities include well water and private sewer; roof is shingle
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    Two-Unit Residential Income Property
    Two-Unit Residential Income Property

    20 Chestnut Street, Rockland, ME 04841

    $445,000
    2,728 sqft 0.23 AC lot

    Two living units on a quiet street, featuring recent updates, multiple parking arrangements, and a private one-bedroom apartment.

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    Side-by-Side Duplex Opportunity
    Side-by-Side Duplex Opportunity

    80 Pleasant Street, Rockland, ME 04841

    $350,000
    1,956 sqft

    In-town side-by-side duplex with one long-term tenant and one available unit at 80 Pleasant Street.

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    Up-and-Down Duplex with Walk-Out Basement
    Up-and-Down Duplex with Walk-Out Basement

    1032 Commercial Street, Rockport, ME 04856

    $375,000
    1,346 sqft 0.40 AC lot

    Updated second-floor apartment and a walk-out basement add flexible space in this up-and-down duplex on Commercial Street.

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    Farmhouse Multifamily with 3-Story Barn
    Farmhouse Multifamily with 3-Story Barn

    63 Old Rockland Street, Rockport, ME 04856

    $495,000
    1,805 sqft 0.97 AC lot

    A 3-bedroom farmhouse with a wrap-around porch plus an additional little house and a 3-story barn on 0.97 acres.

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    Two-Unit Residential Income Property
    Two-Unit Residential Income Property

    350 Main Street, Warren, ME 04864

    $335,000
    2,000 sqft 0.06 AC lot

    Two-unit property with a 3-bay garage and off-street parking in central Warren, ME, with an older foundation.

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    Two-Unit Duplex with Walk-Out Basement
    Two-Unit Duplex with Walk-Out Basement

    1032 Commercial Street, Rockport, ME 04856

    $375,000
    1,346 sqft

    Up-and-down duplex includes a walk-out basement, large yard, and a concrete slab for a garage.

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    Duplex with Off-Street Parking
    Duplex with Off-Street Parking

    323 Broadway, Rockland, ME 04841

    $379,000
    1,881 sqft 0.25 AC lot

    Well-maintained Rockland duplex with two rental units, a yard, and off-street parking for up to four vehicles.

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    Residential Income Duplex with Pond
    Residential Income Duplex with Pond

    810 Rockland Street, Rockport, ME 04856

    $405,000
    2,811 sqft 4.06 AC lot

    Two detached homes on 4.06 acres, including a 3-bedroom Cape needing updates and a move-in-ready 2-bedroom ranch.

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    Two-Unit Residential Income Property
    Two-Unit Residential Income Property

    350 Main Street, Warren, ME 04864

    $335,000
    2,000 sqft

    Two-unit property with a 3-bay garage/barn used as a woodworking studio and additional off-street parking.

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    Two-Unit Mixed-Use Property
    Two-Unit Mixed-Use Property

    30 Burkett Road, Union, ME 04862

    $325,000
    1,824 sqft 0.10 AC lot

    Ground-floor bakehouse space with prep rooms and 1.5 baths, plus an upstairs two-bedroom apartment.

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    Mixed-Use Two-Unit Property
    Mixed-Use Two-Unit Property

    30 Burkett Road, Union, ME 04862

    $325,000
    1,824 sqft 0.10 AC lot

    Two-unit mixed-use building with a leased main-level retail/food space and an apartment above.

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    Renovated Duplex with Two Bedrooms
    Renovated Duplex with Two Bedrooms

    80 Rankin St, Rockland, ME 04841

    $415,000

    Renovated duplex with two-bedroom, one-bath units and a 2023 sewer line upgrade.

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    In-Town Duplex with Private Parking
    In-Town Duplex with Private Parking

    30 - 32 Granite Street, Rockland, ME 04841

    $465,000
    2,800 sqft 0.12 AC lot

    Well-maintained two-unit duplex with private parking, updated exterior systems, and mirror-image 4-bedroom layouts.

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    Multifamily Storage and Refurb Potential
    Multifamily Storage and Refurb Potential

    1257 N Pond Road, Warren, ME 04864

    $385,000
    3,888 sqft 15.00 AC lot

    15-acre parcel with three floors of usable space and an existing area suited for boat storage via a large overhead door.

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    Retail and Duplex Mixed-Use
    Retail and Duplex Mixed-Use

    148 & 144 Main Street, Rockland, ME 04841

    $625,000

    Two Main Street lots offer a retail space with a commercial kitchen plus a duplex ready for remodel or rebuild.

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    Based on your search, we've compiled Potential Opportunities for your consideration. Besides 17 Active Listings in Knox County, ME

    Knox County, ME Duplexes Market Trends and Statistics

    Explore 17 duplexes for sale in Knox County, ME, showcased through 17 active listings on our real estate platform. These investment opportunities span a total of 33,353 square feet of properties for sale, with an estimated market value of $7,538,900.

    Sale prices for duplexes in Knox County, ME start at $325,000, averaging $443,464, and reaching up to $1,125,000 — 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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