Monroe County, FL Duplexes for Sale

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Updated: Jan 22

Two-Story Duplex with Patio

329 63 Court Gulf, Marathon, FL 33050

$500,000

1,302 sqft 0.24 AC lot

Two‑story duplex with two 1‑bedroom, 1‑bathroom units
1,302 SF building on a 10,591 SF lot
RM - Residential Medium zoning
CBS construction with tar/gravel roof; built in 1968
Patio, electric heating, and wall/window cooling units

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329 63 Court Gulf, Marathon, FL 33050

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Est. Cap Rate

4.4%
NOI ÷ price
Est. NOI

$22K
Annual
Price @ 7% Cap

$312K
Suggested
Property Type

Multi-Family Dwellings
Built 1968

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Updated: Aug 12

Waterfront Short-Term Rental Property

219 Sombrero Beach Road, Marathon, FL 33050

$1,439,000

1,840 sqft 0.16 AC lot

1,840‑square‑foot waterfront property with four bedrooms and three bathrooms
31 feet of private dockage near Sombrero Beach
Private pool with patio, deck, porch, and cabana‑style outdoor area
RM - Residential Medium zoning
Built in 2017 with central heating and central air

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Canal-Front Duplex with Two Entrances

31032 Hollerich Drive, Big Pine Key, FL 33043

$899,000

1,460 sqft 0.12 AC lot

Waterfront duplex with two 2BR/1BA units, private entrances, updated kitchens, renovated baths, and canal-front outdoor space.

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Waterfront Duplex with Boat Lift

139 Marina Avenue, Key Largo, FL 33037

$2,750,000

2,485 sqft 0.21 AC lot

Renovated two-unit waterfront property with private pool, dock, gated access, and separate utility meters.

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Fully Renovated Duplex Income Property

1018 Georgia St, Key West, FL 33040

$999,999

1,452 sqft

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

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Waterfront Duplex with Private Pool

241 Sombrero Beach Road, Marathon, FL 33050

$1,400,000

1,840 sqft 0.17 AC lot

RM-zoned waterfront property with a private dock, direct ocean access, and a fenced tropical outdoor area.

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Renovated Duplex

1126 Grinnell Street, Key West, FL 33040

$1,195,000

875 sqft 0.03 AC lot

Two independent one-bedroom residences share a private yard and updated kitchens within HNC(1-3) zoning.

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Waterfront Duplex with Buildable Lot

Big Pine Key, FL 33043

$1,099,000

1,888 sqft 0.33 AC lot

Duplex property offers direct waterfront access plus an additional buildable vacant lot on deep, clean canals.

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Two-Story Walgreens Retail Building

527 Duval St, Key West, FL 33040

Contact for pricing

9,687 sqft 0.28 AC lot

Two-story Walgreens for sale with a new 13-year lease and two attached residential units totaling 1,083 square feet.

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Canal-Front Duplex with Private Dockage

126 N Indies Drive, Duck Key, FL 33050

$1,875,000

2,544 sqft 0.18 AC lot

Canal-front duplex on Duck Key with two side-by-side units, private balcony, in-unit washer and dryer, and new dockage.

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Duplex with Private Pool

1516 17th Terrace, Key West, FL 33040

$1,875,000

2,423 sqft 0.30 AC lot

Corner duplex with a detached guest cottage, fenced grounds, covered parking, and a private pool.

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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 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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Historic Duplex with Private Pool

606 Grinnell Street, Key West, FL 33040

$1,675,000

1,870 sqft 0.06 AC lot

Two residences offer separate access, full kitchens, living areas, and shared outdoor amenities.

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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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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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Corner Duplex Lot with Cottage

2330 Staples Avenue, Key West, FL 33040

$999,000

693 sqft 0.15 AC lot

Corner lot with a cottage and alley access, plus a demolished second unit ready for new construction.

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Legal Duplex with Private Driveway

1306 Virginia Street, Key West, FL 33040

$1,299,999

1,428 sqft 0.08 AC lot

Historic legal duplex with separate electric and water meters, offering two-bedroom and one-bedroom living units.

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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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Canal-Front Stilted Duplex with Dockage

29678 Enterprise Avenue, Big Pine Key, FL 33043

$1,295,000

1,820 sqft 0.17 AC lot

Canal-front stilted duplex with two two-bedroom, one-bath residences, central HVAC, and deep-water boating access.

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Waterfront Duplex with Dock

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

$1,725,000

2,244 sqft

Two three-bedroom units feature separate utilities, fenced outdoor space, and canal access for flexible occupancy options.

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Waterfront Duplex with Dockage

303 Sombrero Beach Road, Marathon, FL 33050

$1,549,000

2,114 sqft 0.25 AC lot

Stilted waterfront duplex with a pool, 110 feet of concrete seawall, and dockage for deep-water boating access.

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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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Updated Waterfront Half-Duplex

17 Manowar Drive, Marathon, FL 33050

$675,000

834 sqft 0.08 AC lot

Two-bedroom, two-bath residence with a new seawall, private dock, and partial open-water views.

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Monroe County, FL Duplexes Market Trends and Statistics

Explore 49 duplexes for sale in Monroe County, FL, showcased through 49 active listings on our real estate platform. These investment opportunities span a total of 89,293 square feet of properties for sale, with an estimated market value of $69,077,991.

Sale prices for duplexes in Monroe County, FL start at $295,000, averaging $1,439,124, 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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