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    Marathon, FL Duplexes for Sale

    10 results
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    Charming Duplex in Little Venice
    $699,000
    907 SF

    Charming Duplex in Little Venice

    487 116 St, Marathon, FL 33050

    Versatile duplex in Marathon, Florida Keys, ideal for living/investment.

    • Desirable Little Venice location in Marathon, close to shopping, dining, and marinas.
    • Versatile duplex with potential for owner occupancy and rental income.
    • Two separate units: a 1‑bedroom/1‑bath main unit and an efficiency unit with a full bath.
    • Large detached storage building with washer and dryer.
    • Corner lot location.
    Updated: Feb 11
    View details
    Waterfront Duplex Near Sombrero Beach
    $785,000
    834 SF

    Waterfront Duplex Near Sombrero Beach

    17 Man-O-War Dr, Marathon, FL 33050

    Updated half-duplex with new dock, ideal for rental income.

    • Waterfront property with new 45‑ft dock and new seawall.
    • Short walking distance to Sombrero Beach.
    • Priced below appraised value.
    • Newly updated with new vinyl plank flooring, tiled shower, updated kitchen, and newer appliances.
    • Freshly painted inside and out; move‑in ready.
    Updated: Feb 10
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    Ocean View Duplex in Marathon
    $1,500,000
    1,590 SF

    Ocean View Duplex in Marathon

    Remodeled duplex with ocean views and direct ocean access.

    945 98 St, Marathon, FL 33050
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    Waterfront Duplex Near Sombrero Beach
    $785,000
    834 SF

    Waterfront Duplex Near Sombrero Beach

    Updated half-duplex with new dock near Sombrero Beach.

    18 Man-O-War Dr, Marathon, FL 33050
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    Waterfront Duplex in Sombrero Beach
    $1,550,000
    1,668 SF

    Waterfront Duplex in Sombrero Beach

    Updated waterfront duplex with dock and ocean access in Marathon.

    17-18 Man-O-War Dr, Marathon, FL 33050
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    Renovated Duplex on Deep Water
    $1,650,000
    1,854 SF

    Renovated Duplex on Deep Water

    Turnkey duplex in Marathon with ocean access and rental income.

    574-576 99 St, Marathon, FL 33050
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    Two-Story Duplex in Marathon
    $700,000
    1,302 SF

    Two-Story Duplex in Marathon

    Two-story duplex in Marathon, ideal for redevelopment and expansion.

    329 63 Ct Gulf Ct, Marathon, FL 33050
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    Multifamily Complex in Marathon, Florida
    $1,800,000
    3,017 SF

    Multifamily Complex in Marathon, Florida

    Multifamily complex with redevelopment potential in a high-demand location.

    13755 Overseas Hwy, Marathon, FL 33050
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    Waterfront Duplex in Marathon, Florida
    $1,099,000
    1,512 SF

    Waterfront Duplex in Marathon, Florida

    Duplex with canal access, ideal for rental income or residence.

    4901/4903 49 St, Marathon, FL 33050
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    Waterfront Duplex with Dock
    $1,750,000

    Waterfront Duplex with Dock

    Duplex with dock, pool, and short-term rental potential.

    440-442 48Th Street Ocean, Marathon, FL 33050
    View details
    Based on your search, we've compiled 14 Potential Opportunities for your consideration. Besides 10 Active listings in Marathon, FL, we suggest exploring several alternatives: 4 properties in Nearby Cities

    Explore Opportunities in Nearby Cities

    Here are 4 Similar properties we found in Nearby Locations for your consideration.

    Canal-Front Duplex with Rental History
    $3,395,000
    4,478 SF

    Canal-Front Duplex with Rental History

    7-bedroom duplex with income potential and waterfront access.

    580 10 St, Key Colony Beach, FL 33051
    View details
    Waterfront Home in Key Colony Beach
    $2,750,000
    3,248 SF

    Waterfront Home in Key Colony Beach

    6-bedroom, 4-bath waterfront home with pool and dock.

    581 10 St, Key Colony Beach, FL 33051
    View details
    Canal Front Duplex in Florida
    $899,000
    1,460 SF

    Canal Front Duplex in Florida

    Duplex with canal access, ideal for investment or personal use.

    31034 Hollerich Dr, Big Pine Key, FL 33043
    View details
    Income Producing Duplex in Big Pine
    $759,000
    1,924 SF

    Income Producing Duplex in Big Pine

    Income-producing duplex with boating access in Big Pine Key, Florida.

    1433 Sunset Rd, Big Pine Key, FL 33043
    View details

    Marathon, FL Duplexes Investment Opportunities Market Analysis

    Explore 10 duplexes for sale in Marathon, FL, showcased through 10 active listings on our real estate platform. These investment opportunities span a total of 3,502,263,640 square feet of properties for sale, with an estimated market value of $9,869,000.

    Sale prices for duplexes in Marathon, FL start at $700,000, averaging $1,233,625, and reaching up to $1,800,000 — 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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