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    Knox County, ME Duplexes for Sale

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    Portland, ME Lewiston, ME Bangor, ME Augusta, ME Auburn, ME Waterville, ME Biddeford, ME Rockland, ME
    14 properties
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    Duplex with Harbor Views
    Updated: Oct 14
    Duplex with Harbor Views

    34 Waldo Avenue, Rockland, ME 04841

    $899,000
    2,776 sqft 0.38 AC lot
    City‑approved duplex use
    2,776 square feet across three levels on a 0.38‑acre lot
    Three bedrooms and three bathrooms
    Finished basement and heated four‑season sunporch
    Harbor views framed by floor‑to‑ceiling windows
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    Historic Duplex with Barn
    Updated: Jul 9
    Historic Duplex with Barn

    77 Main Street, Rockport, ME 04856

    $1,125,000
    2,762 sqft 0.94 AC lot
    2,762 square feet configured as two residential units
    0.94‑acre level lot at 77 Main Street, Rockport, ME 04856
    1890 Greek Revival design with wood floors and period architectural details
    Separate entrances and parking for both units
    Newer roof, replacement windows, and spray‑foamed foundation
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    Updated Duplex with Water Views
    Updated Duplex with Water Views

    122 Camden Street, Rockland, ME 04841

    $325,000
    1,540 sqft 0.15 AC lot

    Two separate one-bedroom units feature water views and recent building improvements.

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    Duplex-Approved Home with Harbor Views
    Duplex-Approved Home with Harbor Views

    34 Waldo Avenue, Rockland, ME 04841

    $899,000
    2,776 sqft 0.38 AC lot

    City approval for duplex use accompanies a three-level residence with harbor views and a finished basement.

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    Duplex With Boat Storage
    Duplex With Boat Storage

    1257 N Pond Road, Warren, ME 04864

    $299,000
    3,888 sqft 15.00 AC lot

    Three floors combine two residential apartments with substantial storage space on a wooded Shoreland-zoned parcel.

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    Duplex with Updated Exterior
    Duplex with Updated Exterior

    30 - 32 Granite Street, Rockland, ME 04841

    $439,000
    2,800 sqft 0.12 AC lot

    Two matching residences offer flexible layouts, private access, and off-street parking near Rockland’s downtown amenities.

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

    30 Burkett Road, Union, ME 04862

    $325,000
    1,824 sqft 0.10 AC lot

    Two-unit configuration combines a leased main-floor commercial space with an upstairs apartment in Union’s central business district.

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    Victorian Duplex With Office Space
    Victorian Duplex With Office Space

    13 Wood St, Camden, ME 04843

    $849,000
    2,454 sqft

    Historic two-unit property with office space, a backyard, lookout tower, and two driveways near Camden’s waterfront.

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    Two-Unit Historic Duplex
    Two-Unit Historic Duplex

    77 Main St, Rockport, ME 04856

    $1,125,000
    2,762 sqft 0.94 AC lot

    Separate entrances and parking serve two residential units, with a substantial barn and outdoor grounds.

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    Renovated Duplex with Apartment
    Renovated Duplex with Apartment

    20 Chestnut St, Rockland, ME 04841

    $340,000
    2,728 sqft 0.23 AC lot

    Two living units include a three-bedroom main residence and a private-entry one-bedroom apartment.

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    Duplex with Walkout Basement
    Duplex with Walkout Basement

    1032 Commercial St, Rockport, ME 04856

    $335,000
    1,346 sqft

    Up-and-down layout with a recently painted second-floor apartment, large yard, and concrete slab for a garage or ADU.

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    Duplex With Water Views
    Duplex With Water Views

    122 Camden Street, Rockland, ME 04841

    $325,000
    1,540 sqft

    Two separate one-bedroom apartments with recent building improvements and water views in Rockland.

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    Four-Bedroom Duplex
    Four-Bedroom Duplex

    30-32 Granite Street, Rockland, ME 04841

    $439,000
    2,800 sqft

    Two matching residential units offer flexible layouts, private parking, and separate entrances in an in-town setting.

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    Duplex with Mirror-Image Units
    Duplex with Mirror-Image Units

    30 - 32 Granite Street, Rockland, ME 04841

    $439,000
    2,800 sqft

    Two residential units offer flexible living arrangements, private parking, and convenient access to downtown amenities.

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    14 active listings match your search: Duplex for sale in Knox County, ME.

    Knox County, ME Duplexes Market Trends and Statistics

    Explore 14 duplexes for sale in Knox County, ME, showcased through 14 active listings on our real estate platform. These investment opportunities span a total of 34,796 square feet of properties for sale, with an estimated market value of $8,163,000.

    Sale prices for two-family homes in Knox County, ME start at $299,000, averaging $583,071, 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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    Featured Knox County Real Estate Agencies

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

    Cates Real Estate
    313 Main Street Rockland, ME 04841
    Phone: (207) 701-5600
    www.catesre.com
    Camden Real Estate Company
    43 Elm St Camden, ME 04843
    Phone: (207) 236-6171
    www.camdenre.com
    Camden Coast Real Estate
    80 Elm Street Camden, ME 04843
    Phone: (207) 236-1111
    camdencoast.com
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