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    Monroe County, FL Duplexes for Sale

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    Miami, FL Tampa, FL Jacksonville, FL
    33 results
    Waterfront Duplex with Redevelopment Potential
    $1,250,000
    1,500 SF

    Waterfront Duplex with Redevelopment Potential

    230 Apache Street, Plantation Key, FL 33070

    Canal-front duplex in Plantation Key with income and redevelopment options.

    • Canal‑front property with 32' dockage for easy bay and ocean access.
    • Redevelopment potential, including single‑family conversion and TDR creation.
    • Income‑producing duplex: two 2‑bedroom, 1‑bath units with long‑term tenants.
    • Located in the desirable 'Indian Mound' neighborhood.
    • Solid construction with a 5V‑crimp Galvalume metal roof and two 2019 A/C systems.
    Updated: Apr 18
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    Waterfront Duplex with Bonus Suite
    $2,699,999
    3,568 SF

    Waterfront Duplex with Bonus Suite

    Key West, FL 33040

    Upgraded multifamily duplex with bonus suite, waterfront access, boat lift.

    • Waterfront property with over 80' of concrete seawall and an 8,000 lb boat lift, providing direct access to open water and Geiger Key Marina.
    • Multifamily duplex‑style home with a bonus suite, offering flexibility for living, family, guests, or rental income.
    • Main upstairs unit features 3 bedrooms and 3.5 bathrooms, and a large living room opening to a private deck overlooking the canal.
    • Each unit (upstairs, downstairs, and bonus suite) is fully self‑contained with a private entrance, kitchen, and laundry.
    • Secure electric gated entry for the main unit, providing convenience and security.
    Updated: Mar 4
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    Legal Duplex on Spacious Lot
    $1,250,000
    2,664 SF

    Legal Duplex on Spacious Lot

    Legal duplex with rental income potential on a 10,000 SqFt lot.

    1409 4Th Street, Key West, FL 33040
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    Key West Duplex with Pool
    $1,875,000
    2,423 SF

    Key West Duplex with Pool

    Spacious duplex with pool, ideal for various living arrangements.

    1516 17th Terrace, Key West, FL 33040
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    Key Largo Legal Duplex
    $799,000
    1,496 SF

    Key Largo Legal Duplex

    Updated duplex near Harry Harris Park, generating $5350 monthly.

    102 Harry Harris Drive, Key Largo, FL 33070
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    Marathon Duplex with Redevelopment Potential
    $650,000
    1,040 SF

    Marathon Duplex with Redevelopment Potential

    Duplex in Marathon, Florida Keys, with redevelopment potential.

    746 50th Street Gulf, Marathon, FL 33050
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    Key West Duplex Redevelopment Opportunity
    $825,000
    1,464 SF

    Key West Duplex Redevelopment Opportunity

    Legal duplex in prime location with redevelopment potential and owner financing.

    3711 Eagle Avenue, Key West, FL 33040
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    Charming Key West Duplex
    $1,750,000
    1,870 SF

    Charming Key West Duplex

    Versatile Old Town duplex with pool, ideal for investment.

    606 Grinnell Street, Key West, FL 33040
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    Key West Income Producing Duplex
    $999,999
    1,452 SF

    Key West Income Producing Duplex

    Renovated duplex in Old Town Key West with income potential.

    1018 Georgia Street, Key West, FL 33040
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    Key West Corner Duplex Opportunity
    $1,100,000
    693 SF

    Key West Corner Duplex Opportunity

    Spacious corner duplex lot with redevelopment potential in Key West.

    2330 Staples Avenue, Key West, FL 33040
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    Key West Legal Duplex
    $1,250,000
    1,119 SF

    Key West Legal Duplex

    Well-maintained two-story duplex in Key West's Midtown East.

    1911 Seidenberg Avenue, Key West, FL 33040
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    Key West Legal Duplex
    $1,395,000
    1,428 SF

    Key West Legal Duplex

    Historic duplex in Old Town Key West with investment potential.

    1306 Virginia Street, Key West, FL 33040
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    Historic Key West Duplex
    $1,174,000
    1,395 SF

    Historic Key West Duplex

    Charming duplex near Old Town and beaches, potential single-family conversion.

    1209 Pearl Street, Key West, FL 33040
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    Key West Legal Duplex
    $1,785,000
    1,932 SF

    Key West Legal Duplex

    Legal duplex in a quiet neighborhood, close to the beach.

    1505 Rose Street, Key West, FL 33040
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    Waterfront Duplex with Rental Potential
    $1,849,000
    2,540 SF

    Waterfront Duplex with Rental Potential

    Renovated waterfront duplex in Key Colony Beach with rental income.

    Key Colony Beach, FL 33051
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    Key West Residential Duplex
    $1,354,000
    1,904 SF

    Key West Residential Duplex

    Residential duplex with long-term rentals in place.

    1612 Laird Street, Key West, FL 33040
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    Marathon Duplex Redevelopment Opportunity
    $650,000
    1,460 SF

    Marathon Duplex Redevelopment Opportunity

    Duplex in Marathon, Florida Keys, with redevelopment potential.

    746 50th St Gulf, Marathon, FL 33050
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    Two-Story Duplex in Marathon
    $675,000
    1,302 SF

    Two-Story Duplex in Marathon

    Two-story duplex on a large lot in Marathon, Florida.

    329 63 Court Gulf, Marathon, FL 33050
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    Key West Duplex with Income
    $949,000
    1,239 SF

    Key West Duplex with Income

    Well-maintained duplex in Key West with income potential.

    2004 Patterson Avenue, Key West, FL 33040
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    Key West Corner Duplex Lot
    $1,100,000
    0.15 Acres

    Key West Corner Duplex Lot

    Rare investment opportunity in prime Key West location.

    2330 Staples Avenue, Key West, FL 33040
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    Key West Duplex Opportunity
    $1,200,000
    2,280 SF

    Key West Duplex Opportunity

    Duplex near Ed Knight Pier, generating $7,600 monthly income.

    1328 Laird Street, Key West, FL 33040
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    Charming Multi-Residence Property
    $1,050,000
    1,950 SF

    Charming Multi-Residence Property

    Renovated multi-residence property with lush landscaping in Tavernier.

    162 Jo-Jean Way, Key Largo, FL 33070
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    Canal-Front Duplex with Rental History
    $2,995,000
    4,478 SF

    Canal-Front Duplex with Rental History

    7-bedroom, 7-bath duplex with income potential in Key Colony.

    Key Colony Beach, FL 33051
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    Key West Legal Duplex
    $1,650,000
    2,016 SF

    Key West Legal Duplex

    Historic Key West duplex, potential single-family conversion, income-generating.

    1022 Fleming Street, Key West, FL 33040
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    Monroe County, FL Duplexes Investment Opportunities Market Analysis

    Explore 33 duplexes for sale in Monroe County, FL, showcased through 33 active listings on our real estate platform. These investment opportunities span a total of 54,684 square feet of properties for sale, with an estimated market value of $54,570,498.

    Sale prices for duplexes in Monroe County, FL start at $650,000, averaging $1,881,741, and reaching up to $9,888,000 — 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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