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    Key West, FL
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    Key West, FL Duplexes for Sale

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    Stock Island, FL Sugarloaf Key, FL Cudjoe Key, FL
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    Legal Duplex on Spacious Lot
    Updated: Mar 1
    Legal Duplex on Spacious Lot

    1409 4Th Street, Key West, FL 33040

    $1,250,000
    2,664 sqft 0.23 AC lot
    Legal duplex on a 10,000 SF corner lot with a main residence plus a separate 2‑bedroom, 1‑bath cottage
    Main residence: 2,004 SF CBS construction with 2 bedrooms, 2 bathrooms, living room, kitchen, and dining area
    Separate cottage: 660 SF with 2 bedrooms and 1 bathroom, suitable for rental income, extended family, or guest use
    Outdoor features include a deck, patio, and shed, plus private pool (Pool Private Y/N: true)
    Appliances included: washer, dryer, dishwasher, refrigerator, oven, and microwave; central heating and central air
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    This listing looks promising.

    Here's a quick look at some key insights for

    1409 4Th Street, Key West, FL 33040

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    • Est. Cap Rate

      3.6%
      NOI ÷ price

    • Est. NOI

      $45K
      Annual

    • Price @ 7% Cap

      $638K
      Suggested

    • Property Type

      Multi-Family Dwellings
      Built 1976
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    Renovated Duplex with Private Yard
    Updated: Jun 22
    Renovated Duplex with Private Yard

    1126 Grinnell Street, Key West, FL 33040

    $1,325,000
    875 sqft 0.03 AC lot
    Renovated duplex in Old Town Key West with two distinct 1‑bedroom, 1‑bath residences
    Each unit includes a European‑style kitchen with built‑in cabinets
    Appliances included: washer, dryer, refrigerator, range, microwave, and freezer; stainless steel appliance package
    Ductless cooling; vinyl, combo, and tile flooring
    Metal roof and frame construction
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    Key West Duplex with Pool
    Key West Duplex with Pool

    1516 17th Terrace, Key West, FL 33040

    $1,875,000
    2,423 sqft 0.30 AC lot

    Spacious duplex with pool, ideal for various living arrangements.

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    Charming Duplex in Old Town
    Charming Duplex in Old Town

    606 Grinnell Street, Key West, FL 33040

    $1,750,000
    1,870 sqft

    Key West duplex with flexible living and investment potential.

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    Turn Any Listing Into an Investment Snapshot Owner equity, real caprate, demand score for every listing. Go To Analytics Center
    Key West Duplex Redevelopment Opportunity
    Key West Duplex Redevelopment Opportunity

    3711 Eagle Avenue, Key West, FL 33040

    $825,000
    1,464 sqft 0.14 AC lot

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

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    HCT-Zoned Multifamily Development Site
    HCT-Zoned Multifamily Development Site

    1430 Vernon Avenue, Key West, FL 33040

    $9,888,000
    2,071 sqft 0.20 AC lot

    Two-story Key West property in the HCT Historic Commercial Tourist District with two separate electric meters.

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    Charming Key West Duplex
    Charming Key West Duplex

    606 Grinnell Street, Key West, FL 33040

    $1,750,000
    1,870 sqft 0.06 AC lot

    Versatile Old Town duplex with pool, ideal for investment.

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    Waterfront Duplex with Bonus Suite
    Waterfront Duplex with Bonus Suite

    Key West, FL 33040

    $2,699,999
    3,568 sqft

    Upgraded multifamily duplex with waterfront access and rental income potential.

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    Key West Legal Duplex
    Key West Legal Duplex

    1911 Seidenberg Avenue, Key West, FL 33040

    $1,250,000
    1,119 sqft 0.12 AC lot

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

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    Key West Corner Duplex Lot
    Key West Corner Duplex Lot

    2330 Staples Avenue, Key West, FL 33040

    $999,000
    693 sqft 0.15 AC lot

    Spacious duplex lot with redevelopment potential in Key West.

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    Fully Renovated Duplex Income Property
    Fully Renovated Duplex Income Property

    1018 Georgia Street, Key West, FL 33040

    $999,999
    3,042 sqft

    Turnkey, renovated duplex with separate electric and two downstairs lockout units plus an occupied upstairs unit.

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    Historic Key West Duplex Opportunity
    Historic Key West Duplex Opportunity

    1306 Virginia Street, Key West, FL 33040

    $1,369,000
    1,428 sqft 0.08 AC lot

    Legal duplex in Old Town Key West with investment potential.

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    Key West Residential Duplex
    Key West Residential Duplex

    1612 Laird Street, Key West, FL 33040

    $1,354,000
    1,904 sqft 0.14 AC lot

    Residential duplex with long-term rentals in place.

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    Key West Duplex with Income
    Key West Duplex with Income

    2004 Patterson Avenue, Key West, FL 33040

    $925,000
    1,239 sqft 0.12 AC lot

    Well-maintained duplex in Key West with income potential.

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    Mixed-Use Income Property with Restaurant
    Mixed-Use Income Property with Restaurant

    405 Petronia Street, Key West, FL 33040

    $2,999,999
    1,596 sqft 0.05 AC lot

    Fully rented mixed-use property with 2 residential units, office space, and a detached restaurant on a small Key West lot.

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    Key West Legal Duplex
    Key West Legal Duplex

    1022 Fleming Street, Key West, FL 33040

    $1,650,000
    2,016 sqft 0.06 AC lot

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

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    Based on your search, we've compiled 20 Potential Opportunities for your consideration. Besides 16 Active listings in Key West, FL, we suggest exploring several alternatives: 4 properties in Nearby Cities

    Opportunities in Nearby Cities

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

    Waterfront Multi-Family Estate
    Waterfront Multi-Family Estate

    901 46th Street, Marathon, FL 33050

    $2,799,000
    3,047 sqft 0.43 AC lot

    Two Gulf-front homes include a private dock, pools, and separate living spaces on an open-water lot.

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    Canal-Front Stilt Duplex
    Canal-Front Stilt Duplex

    29678 Enterprise Avenue, Big Pine Key, FL 33043

    $1,295,000
    1,820 sqft 0.17 AC lot

    Stilted duplex with two 2-bedroom units, offering 75 feet of concrete dockage and deep-water boating access.

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    Waterfront Duplex with Seawall
    Waterfront Duplex with Seawall

    3962-3964 No Name Road, Big Pine Key, FL 33043

    $987,500
    1,536 sqft 0.17 AC lot

    This waterfront duplex offers two separate units, each with its own utility and laundry room.

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    Waterfront Duplex with Dock
    Waterfront Duplex with Dock

    440-442 48th Street Ocean, Marathon, FL 33050

    $1,725,000

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

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    Key West, FL Duplexes Market Trends and Statistics

    Explore 16 duplexes for sale in Key West, FL, showcased through 16 active listings on our real estate platform. These investment opportunities span a total of 31,774 square feet of properties for sale, with an estimated market value of $34,694,997.

    Sale prices for duplexes in Key West, FL start at $825,000, averaging $2,040,882, 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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    Top Commercial Asset Segments

    Commercial property segments ranked by active listings on the market

    Duplexes 16
    Apartment buildings 11
    Triplexes 4
    Mobile home & RV parks 3
    Quadplexes 3

    Demographics Overview

    Population 36K
    Population Growth (5Y) +3.8%
    Median Household Income $79,038
    College Educated 17.6%

    High-Yield Neighborhoods for Investment

    Identify Key West submarkets with the highest inventory density on the market and evaluate the average listing prices of real estate assets

    Neighborhood Average Price
    33040 $1.5M

    Taxes & Financing

    Tax Rate (average for all types) 0.71%
    Property Tax per SF $10.90 per SF
    Tax Rate vs County Average 0.03 pp below county avg
    Average Loan-to-Value 65.0%

    Listings Trend

    New vs delisted commercial listings in Monroe County

    New Delisted

    Total CRE Inventory on Market (SF)

    Average Property Price per SF

    For-sale pricing trends across core commercial property types in Monroe County

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    Residential Income

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