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    Monroe County, FL Duplexes for Sale

    30 results
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    Key West Legal Duplex
    $1,150,000

    Key West Legal Duplex

    1018 Georgia St, Key West, FL 33040

    Legal duplex in Old Town Key West with recent upgrades.

    • Legal duplex in desirable Old Town Key West location, across from Bay View Park.
    • Completely renovated with new roof, siding, kitchens, bathrooms, subflooring, and impact windows.
    • Excellent income potential with projected monthly income of $7,800 and a 6.5% cap rate.
    • Downstairs units can be rented separately: back unit for $2,500 (with backyard), front unit for $2,200.
    • Separate electric and water meters for each unit, with tenants paying their own utilities.
    Updated: Jan 6
    View details
    Beachfront Multifamily Investment Opportunity
    $3,899,000
    1,647 SF

    Beachfront Multifamily Investment Opportunity

    65620 Overseas Hwy, Long Key, FL 33001

    Iconic Long Key beachfront duplex with nightly rental potential.

    • Income‑producing duplex with nightly rental potential on a private, white sandy beach
    • Enjoy 221' of beachfront property with unobstructed Atlantic Ocean views, including both sunrise and sunset
    • Located at the southern tip of Long Key, near Long Key State Park and the Viaduct, a world‑renowned Tarpon fishery
    • Historically significant property, the former site of Henry Flagler's Long Key Fishing Camp, once home to Zane Grey
    • Shallow, tranquil waters ideal for snorkeling, fishing, and relaxation, complemented by numerous tiki huts for shaded retreats
    Updated: Sep 3, 2025
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    Waterfront Duplex with Redevelopment Potential
    $1,350,000
    1,500 SF

    Waterfront Duplex with Redevelopment Potential

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

    228 Apache St, Plantation Key, FL 33070
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    Key West Income-Producing Duplex
    $1,068,000
    1,694 SF

    Key West Income-Producing Duplex

    Duplex near the coast with a solid rent roll.

    1916 Seidenberg Ave, Key West, FL 33040
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    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
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    Key West Multi-Family Homes
    $5,850,000
    3,010 SF

    Key West Multi-Family Homes

    Two homes near Duval Street with private pools and rental history.

    421 Simonton St, Key West, FL 33040
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    Waterfront Multifamily Home with Boat Lift
    $3,300,000
    3,568 SF

    Waterfront Multifamily Home with Boat Lift

    Upgraded multifamily home with waterfront access and rental income potential.

    6 Egret Ln, Key West, FL 33040
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    Updated Duplex Near Oceanfront Park
    $829,000
    1,496 SF

    Updated Duplex Near Oceanfront Park

    Legal duplex near Harry Harris Park, updated interiors, strong rental income.

    102 Harry Harris Dr, Key Largo, FL 33070
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    Income-Producing Duplex in Marathon, FL
    $675,000
    1,040 SF

    Income-Producing Duplex in Marathon, FL

    Legal duplex in Marathon, FL with redevelopment potential.

    744 St Gulf St, Marathon, FL 33050
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    Canal-Front Duplex with Rental History
    $3,650,000
    4,478 SF

    Canal-Front Duplex with Rental History

    7-bedroom duplex with rental history and waterfront access.

    580 10 St, Key Colony Beach, FL 33051
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    Furnished Duplex with Dockage
    $1,943,000
    2,528 SF

    Furnished Duplex with Dockage

    Turnkey duplex with rental income potential and deep water dockage.

    461 3 St, Key Colony Beach, FL 33051
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    Income-Producing Duplex in Big Pine
    $799,000
    1,924 SF

    Income-Producing Duplex in Big Pine

    CBS duplex with boating access and rental income potential.

    1433 Sunset Rd, Big Pine Key, FL 33043
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    Oceanfront Duplex with Dockage
    $2,495,000
    1,716 SF

    Oceanfront Duplex with Dockage

    Oceanfront duplex with deepwater dockage and nightly rental approval.

    127 Seaside Ave, Key Largo, FL 33037
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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
    View details
    Waterfront Retreat in Key Colony
    $875,000
    1,040 SF

    Waterfront Retreat in Key Colony

    Stunning 2-bedroom waterfront property with private docks and bay views.

    47 Sadowski, Key Colony Beach, FL 33051
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    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
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    Historic Duplex Near Key West Beaches
    $1,249,000
    1,395 SF

    Historic Duplex Near Key West Beaches

    Charming duplex near Old Town, beaches, and gallery district.

    1209 Pearl St, Key West, FL 33040
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    Ocean View Duplex in Marathon
    $1,650,000
    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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    Islamorada Multifamily Investment Opportunity
    $990,000
    1,766 SF

    Islamorada Multifamily Investment Opportunity

    Two cottages on one property in Islamorada's vibrant district.

    219 Preston St Upper Matecumbe Ky, Islamorada, FL 33036
    View details
    Renovated Duplex on Deep Water
    $1,700,000
    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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    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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    Key West Duplex on Large Lot
    $1,199,000
    2,664 SF

    Key West Duplex on Large Lot

    Legal duplex on a spacious corner lot in Key West.

    1409 4Th St, Key West, FL 33040
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    Key West Duplex with Pool
    $999,999
    1,421 SF

    Key West Duplex with Pool

    Legal duplex in Key West with in-ground pool.

    620 White St, Key West, FL 33040
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    Key West Income-Producing Duplex
    $950,000
    1,552 SF

    Key West Income-Producing Duplex

    Income-producing duplex with renovated primary home in New Town.

    3707 Paula Ave, Key West, FL 33040
    View details

    Monroe County, FL Duplexes Investment Opportunities Market Analysis

    Explore 30 duplexes for sale in Monroe County, FL, showcased through 30 active listings on our real estate platform. These investment opportunities span a total of 3,502,377,767 square feet of properties for sale, with an estimated market value of $41,058,949.

    Prices for duplexes in Monroe County, FL start at $675,000, averaging $1,785,171, and reaching up to $5,850,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you have the most current data.

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    Browse Duplexes for Sale Near Monroe, FL

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