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$1,295,000
4 Beds ⋅ 4 Baths ⋅ 620882 MLS
Full Waterfront Duplex in Desirable Sombrero Beach! Live the ultimate coastal lifestyle with this beautifully updated waterfront duplex in the highly sought-after Sombrero Beach neighborhood. Whether you're looking for an investment opportunity, a vacation retreat, or a full-time residence with income potential, this property checks every box. Both sides of the duplex have been thoughtfully upgraded, featuring brand-new flooring, fresh interior paint, creating bright, modern living spaces that are completely move-in ready. Step outside and embrace true Keys living -- your new 45-foot dock is right out back, making it effortless to keep your boat just steps from your door. Enjoy partial open water views and the convenience of direct ocean access, perfect for fishing, diving, or sunset cruises at a moment's notice. Each unit offers privacy and flexibility, and both sides are also available for individual purchase, giving buyers multiple ownership options. Priced BELOW appraised value! Waterfront location, boating convenience, and stylish updates -- this is island living at its best. Party wall agreement on file.

17-18 Man-O-War Dr, Marathon
$675,000
2 Beds ⋅ 2 Baths ⋅ 620876 MLS
Newly updated waterfront half-duplex just a short walking distance to Sombrero Beach. This canal front property features brand-new vinyl plank flooring throughout, and an updated kitchen with Stainless appliances. Freshly painted inside and out, the home feels crisp, modern, and move-in ready. Outside, enjoy a new seawall, new 45-ft dock, and partial open-water views, perfect for boating and waterfront living. Whether you're looking for a strong rental income opportunity or a low-maintenance permanent waterfront home, this property checks all the boxes for Keys living. Priced BELOW appraised value! Bonus opportunity: the other half of the duplex is also available for purchase, see MLS # 618475 offering the rare chance to own the entire waterfront property.

18 Man-O-War Dr, Marathon
$675,000
2 Beds ⋅ 2 Baths ⋅ 620875 MLS
Newly updated waterfront half-duplex just a short distance to Sombrero Beach. This bright and inviting property features brand-new vinyl plank flooring throughout, a beautifully tiled shower, and an updated kitchen with newer appliances. Freshly painted inside and out, the home feels crisp, modern, and move-in ready. Outside, enjoy a new seawall, new 45-ft dock, and partial open-water views, perfect for boating and waterfront living. Whether you're looking for a strong rental income opportunity or a low-maintenance permanent waterfront home, this property checks all the boxes for Keys living. Priced BELOW appraised value! Bonus opportunity: the other half of the duplex is also available for purchase, see MLS # 618475 offering the rare chance to own the entire waterfront property.

17 Manowar Dr, Marathon
$1,178,000
6 Beds ⋅ 4 Baths ⋅ 620347 MLS
Income producing new CBS construction full duplex for sale in Coco Plum. Each side is 3 bedroom 2 bath with washer & dryer, covered parking and tenants in place (contact listing agent for lease information). Property is deed restricted affordable housing for professionals living and working in the Marathon and Key Colony Beach area. This property is perfect for business owners looking for employee housing for their staff or investors looking to own long term rentals. This property does not allow short term rentals, housing is only for those working in the middle Keys with verifiable income. No water/dockage access. Property is located in a newly developed area of Coco Plum and is walking distance to Coco Plum Beach. Those who own a business and are hired as an employee of the company can rent and live in one side and rent out the other. Call agent with questions on this investment property.

85 Coco Plum Dr A & B Drive, Marathon
$639,000
2 Beds ⋅ 2 Baths ⋅ 620289 MLS
INCOME PRODUCING! Unlock the potential of this rare Marathon property located in the desirable Vaca Village neighborhood. Situated on a 5,158-square-foot lot, this duplex currently features two separate 1-bedroom, 1-bath residences, providing immediate income-producing potential while offering outstanding future upside. Whether you're seeking rental income, a redevelopment project, or the opportunity to build a custom Keys residence, this property offers exceptional flexibility and value. Conveniently located near Marathon's restaurants, marinas, shopping, and world-class boating and fishing, this is a unique chance to invest in one of the most sought-after destinations in the Florida Keys.

746 50th St, Marathon
$1,549,000
4 Beds ⋅ 4 Baths ⋅ 620220 MLS
Waterfront duplex opportunity on Sombrero Beach Road in Marathon, just about 1 mile from Sombrero Beach. This stilted full duplex offers 4 bedrooms, 4 bathrooms, 2,114 square feet of interior living space, a pool, 110 feet of concrete seawall, dockage, and deep-water boating access. Each side features 2 bedrooms, 2 bathrooms, approximately 1,057 square feet, open living and dining areas, kitchen, washer and dryer, and enclosed sun porch areas with water views. The layout works well for a full-time residence, second home, investment property, or a live-on-one-side and rent-the-other setup. Outdoor features include an in-ground pool, decking, front porch, low-maintenance gravel yard, and a large circular paver driveway with plenty of parking and trailer storage. Boaters will appreciate the 110 feet of dockage with room for multiple vessels. The lower level includes two garages and substantial storage space, ideal for fishing gear, boating equipment, a cabana-style setup, or general storage. With its waterfront setting, duplex layout, pool, dockage, and close proximity to Sombrero Beach, this property offers multiple options in one of Marathon's most desirable lifestyle locations. B&BATVAI

303 Sombrero Beach Rd, Marathon
$1,300,000
4 Beds ⋅ 4 Baths ⋅ 619866 MLS
Beautifully renovated and fully turnkey duplex located on a deep-water canal in the heart of Marathon. This rare income-producing property features two spacious 2BD/2BA units, each offering approximately 927 sq. ft. of updated coastal living with impact windows and doors, granite countertops, stainless steel appliances, tile flooring throughout, and covered parking. Renovated in 2018, the property blends modern finishes with the relaxed Florida Keys boating lifestyle. A true boater's dream, each side offers its own 30' concrete dock and seawall (60' total) complete with 30-amp shore power. Enjoy quick ocean access and easy Gulf access via Vaca Cut, making this an exceptional setup for anglers and boating enthusiasts alike. The waterside outdoor spaces are designed for entertaining and enjoying the Keys lifestyle, featuring string lighting, solar-lit dock pilings, under-dock fish lights that attract snapper and tarpon, and frequent manatee visits along the canal. Located directly adjacent to Oceanfront Park & Dog Park, owners and guests enjoy immediate access to one of Marathon's premier waterfront parks offering a dog park, kayak launch, open green space, waterfront walking areas, playgrounds, and frequent community events. Conveniently located near Sombrero Beach, shopping, dining, and Florida Keys Marathon International Airport. Currently tenant occupied with both units rented month-to-month. This property also has strong vacation rental potential. Ideal opportunity to live in one side while renting the other, or maximize income potential with a fully turnkey investment property in one of the Florida Keys' most desirable boating communities. Current Insurances are very reasonable: $3,841 Flood (Covers both sides) 576 - $4,303 Wind 574 - $4,129 Wind 576 - $860 HO/Liability 574 - $721 HO/Liabilty (Pictures are of 576 99th, 574 is the same layout/finishes. Access can be arranged)

574 & 576 99th St, Marathon
$295,000
2 Beds ⋅ 1 Baths ⋅ 619860 MLS
Investment Opportunity in the Heart of Marathon. This Half Duplex has Two Bedrooms and One Bathroom. Ample parking in the front yard. Long time Tenants in place. Other Half Duplex in the back is also offered for Sale. MLS #619861

250 66th St, Marathon
$495,000
2 Beds ⋅ 1 Baths ⋅ 619582 MLS
Updated, elevated, and centrally located, this 2-bedroom, 1-bath half duplex offers an appealing combination of durable construction, modern finishes, and flexible Keys living. Located in the heart of Marathon and surrounded by mature native landscaping, the residence features CBS construction, an elevated design, a concrete roof, impact-resistant windows, and a newer HVAC system. Inside, the thoughtfully remodeled interior offers an open, comfortable layout with updated flooring, granite countertops, stainless steel appliances, and clean coastal finishes. Two covered parking bays beneath the home provide convenient space for vehicles, a boat, trailer, bicycles, fishing equipment, paddleboards, and the recreational gear that comes with Florida Keys living. Additional open parking and RV or trailer parking add to the property's everyday functionality. With seven-day minimum rentals permitted, the residence offers versatility as a primary home, seasonal retreat, employee-housing solution, or investment property, subject to applicable regulations. Separate electric and water meters provide additional convenience. Ideally positioned near shopping, dining, marinas, beaches, the community boat ramp, and daily conveniences, this move-in-ready property places the best of Marathon within easy reach. The adjoining half duplex is also available for purchase, creating a rare opportunity to acquire the entire property for expanded housing, multigenerational living, or investment potential.

1306 51st St, Marathon
$3,197,000
8 Beds ⋅ 6 Baths ⋅ 619555 MLS
Incredible Income-Producing Full Duplex | 8 Bedrooms | 6 Bathrooms | 4 Bedrooms | 3 Bathrooms per Unit | 2 Pools | 40' Dock Rare opportunity to own a highly desirable, newer construction duplex offering exceptional income potential and resort-style amenities. This property features a total of 8 bedrooms and 6 bathrooms, with each side boasting 4 beds and 3 baths, private entrances, and separate utilities--ideal for investors, vacation rental operators, or owner-occupants seeking rental income. Both units have been well maintained and offer spacious, open floor plans with updated kitchens, ample natural light, and modern finishes. Each side opens to its own private pool--perfect for guests or personal use. The tropical landscaping, fenced yard, and multiple lounging areas create a true retreat atmosphere. A 40-foot dock provides direct water access, making this a boater's dream with potential for added rental income from dock usage. Just minutes from open water with a 4' control depth, this property is a rare find in today's market. Additional features include: Separate laundry for each unit Ample parking Turnkey rental-ready with proven rental history Zoned multifamily Potential for short-term rental (verify with municipality) Centrally located near beaches, dining, shopping, and top local attractions, this duplex delivers strong year-round rental demand. A perfect blend of luxury living and passive income potential. Financials available upon request to qualified buyers. Call to schedule your private showing today.

217 Sombrero Beach Rd Unit 1 & 2, Marathon
$895,000
3 Beds ⋅ 2 Baths ⋅ 619508 MLS
Welcome to your slice of paradise in the heart of Marathon! This exceptional ocean-side retreat is where luxury, lifestyle, and opportunity come together in one unforgettable property. This beautifully reimagined 3-bedroom, 2-bath half duplex offers an expansive 1,342 sq ft of spacious, stylish and light-filled living space--an incredibly rare find for a property of this kind in the Florida Keys. Step outside and you're instantly connected to what makes the Keys so special: 50 feet of brand-new dockage with direct ocean access, making it effortless to spend your days boating, fishing, or cruising turquoise waters at a moment's notice. Inside, no detail has been overlooked. This home has been completely renovated from top to bottom and is offered fully furnished and turnkey--just bring your flip-flops and start living (or earning). The stunning new kitchen, impact windows and doors, brand-new A/C, and sleek, modern finishes create a fresh coastal vibe that feels both luxurious and relaxed. The outdoor space is just as impressive, with a fully rebuilt dock designed for both peace of mind and peak functionality--perfect for accommodating your boat and embracing the ultimate Keys lifestyle. Whether you're searching for a private waterfront escape, a full-time residence, or a high-performing investment, this property checks every box. With short-term rentals allowed, the income potential is as attractive as the setting itself. And for those looking to dream even bigger, there's a rare opportunity to purchase the full duplex--unlocking maximum flexibility, privacy, and earning potential on an entire ocean-access property. Opportunities like this don't come around often--own a spacious, fully renovated waterfront home in one of Marathon's most sought-after locations and start living the life most people only dream about.

150 E 63rd St, Marathon
$895,000
3 Beds ⋅ 2 Baths ⋅ 619502 MLS
Welcome to your slice of paradise in the heart of Marathon! This beautifully reimagined 3-bedroom, 2-bath waterfront retreat offers 1,342 sq ft of spacious stylish, coastal living--an exceptionally rare find for a half duplex in the Florida Keys. Perfectly positioned on the ocean side, you'll enjoy direct ocean access and 50 feet of brand-new dockage--ideal for boating, fishing, and embracing the laid-back Keys lifestyle right from your backyard. Fully renovated from top to bottom, this home is offered completely furnished and turnkey, making it effortless to move in or start generating rental income immediately. Inside, you'll find a stunning new kitchen, impact windows and doors, a new A/C system, and sleek, modern finishes throughout. Step outside to your rebuilt dock, designed for both peace of mind and the ultimate boating experience. With short-term rentals allowed, this property delivers incredible flexibility--whether you're seeking a private island escape, full-time residence, or a high-performing investment. Even better, there's an option to purchase the full duplex, creating a rare opportunity to own an entire ocean-access property with outstanding income potential. Opportunities like this don't come around often--secure your dream waterfront lifestyle in one of Marathon's most sought-after locations!

100 E 63rd St, Marathon
$675,000
2 Beds ⋅ 2 Baths ⋅ 617668 MLS
Easy living in paradise awaits at this solid CBS half-duplex in Marathon. Step out to your 35-ft. dock on a clean, deep canal with quick access to the open ocean, making boating, fishing and island adventures effortless. Inside, enjoy a freshly painted open layout, tile floors and a granite kitchen, while the low-maintenance backyard offers the perfect space for relaxing or entertaining. Ideal as a weekend escape, second home or full-time residence, with the City of Marathon allowing weekly rentals. Your piece of the Florida Keys is ready!

427 89th St, Marathon
$479,000
2 Beds ⋅ 1 Baths ⋅ 618964 MLS
What a gem! This elevated two-bedroom half-duplex offers tons of natural light and peaceful peek-a-boo open ocean views from the living areas and from the porch and fabulous 240sf (!!) covered deck. Situated second in from the ocean on a quiet dead-end street, here's a rare opportunity to buy in a sought-after Middle Keys location at this price, with a lot of bang for the buck! Light, bright and neat, this home features a very private low-maintenance yard with room for a pool and your Keys toys, a metal roof, an open floorplan, and no HOA. An opportunity for superb location, price, and peek-a-boo ocean views seldom presents itself, so don't wait! Live here and relish in the sunny Keys lifestyle or rent it out and generate income. Seven-day-minimum rentals are permitted. Favorite location near beaches, boat ramps, shopping and activities. FaceTime TOURS ARE AVAILABLE FOR QUALIFIED BUYERS!

1297 73rd St, Marathon
$500,000
2 Beds ⋅ 2 Baths ⋅ 618269 MLS
'United States Bankruptcy Auction. The Listing Price is for MLS Purposes only. Actual Price will be determined at Auction. The Auction will take place Live via Zoom on Thursday, September 10, 2026 at 11 AM ET. Bidder Registration Packages and Qualifying Deposits are due on or before Tuesday, September 8, 2026 at 5:00 PM ET. https://www.dropbox.com/scl/fo/6zvlde9vkafsi4gyurrge/AFbZzVpEx4s1umkeSKne1Us?rlkey=9ejdq1stq5w01ifjwsdhdrzyh&st=nzppom5j&dl=0 Excellent opportunity to own a two-story duplex in the heart of Marathon. Each unit offers 1 bedroom and 1 bathroom, situated on a generous 10,591 SF lot. Ideal for redevelopment, expansion, or construction of a larger duplex, subject to local approvals. Prime location near popular restaurants, Sombrero Beach, Marathon Sandbar, Florida Keys Marathon Airport, and Curry Hammock State Park. A versatile property with strong upside potential in the Middle Keys.

329 63 Court Gulf Ct, Marathon
$1,725,000
4 Beds ⋅ 4 Baths ⋅ 618025 MLS
Magnificent legal duplex in the vibrant heart of the Florida Keys, offering highly sought-after 7-day rental flexibility--an exceptional advantage for investors and homeowners alike. Elevated on stilts, this impressive property features two spacious bedrooms and two full bathrooms on each side, creating the perfect setup for extended families, dual living, or maximizing rental income. Ideally located just four properties from the Atlantic Ocean, the home boasts an expansive 70-foot seawall with quick, easy boating access to open water-making it a true boater's paradise. Both residences have been thoughtfully updated with modern finishes, enhancing comfort, style, and long-term value. Whether you're looking for a high-performing vacation rental, a primary residence with income potential, or a combination of both, this rare duplex offers unmatched versatility in one of the Florida Keys' most desirable locations.

668 & 670 89th St, Marathon
$2,650,000
6 Beds ⋅ 4 Baths ⋅ 618849 MLS
Two homes on open water for the price of one! Over 18,000 square foot lot, bay bottom, two building rights. Wake up to endless Gulf views and fall asleep to breathtaking sunsets at this rare waterfront estate. Tucked away at the end of a quiet road, this unique multi-family property sits directly on the Gulf, offering unmatched privacy, open water views, and direct boating access. Whether you're looking for a dream home, vacation getaway, or income-producing investment, this property delivers it all. The main home features 5 bedrooms and 4 bathrooms, highlighted by a beautiful stone fireplace, Miami-Dade pine beams, and multiple private balconies to soak in the coastal scenery. Step outside to your Gulf-front pool, private dock, hot tub, and sandy beach area--perfect for entertaining or simply enjoying the view. A separate 1-bedroom, 1-bath apartment includes its own private pool, and carport, making it ideal for guests, extended family, or living on-site while renting the main home. Why you'll love it: Direct Gulf-front with panoramic water views Licensed vacation rental with proven income history Two private pools + hot tub Private dock with easy Gulf access Flexible multi-family layout Peaceful end-of-road location Numerous upgrades and renovations Currently operating as a successful vacation rental, this property offers strong income potential or the perfect setup for a private coastal retreat.

901 46th St, Marathon
$1,099,000
4 Beds ⋅ 2 Baths ⋅ 616290 MLS
Discover a rare opportunity in the heart of the Florida Keys! This full duplex with TWO building rights offers 2 spacious, 2-bedroom, 1-bathroom units, each unit thoughtfully designed for comfort and convenience. Situated directly on a canal with quick access to open water, it's a dream for boating enthusiasts and an excellent choice for investors seeking strong rental income potential. Perfectly positioned in the center of Marathon, this property places you minutes from beaches, marinas, dining, shopping, and top-rated schools—everything the Keys lifestyle has to offer is right at your fingertips. Residents and guests alike will enjoy evenings on the water, seamless access to both the Atlantic and the Gulf of America, and the laid-back charm that makes Marathon one of the most desirable destinations in the Keys. Whether you're searching for a primary home with supplemental rental income, a dedicated investment property, or a versatile retreat for family and guests, this duplex delivers unmatched potential. Properties like this are rarely available—don't miss your chance to own a slice of Keys waterfront living!

4901/4903 49th St, Marathon
$850,000
3 Beds ⋅ 2 Baths ⋅ 618474 MLS
Wake up to breathtaking open water views and embrace the ultimate Florida Keys lifestyle in this oceanfront A-frame located in the private, highly sought-after Lion's Lair community in Marathon. Opportunities like this are rare--where exceptional amenities, privacy, and value come together in one stunning property. This well-built half duplex welcomes you with sweeping ocean views the moment you step inside, complemented by impact windows and doors for peace of mind. Offering 3 bedrooms, 2 baths, plus a versatile lofted office space, the home is designed for both comfort and flexibility. Step outside to your spacious waterfront deck--perfect for morning coffee at sunrise or unwinding with evening cocktails as the ocean breeze rolls in. The true highlight is the unmatched collection of community amenities: Enjoy a private marina with dockage for boats up to 25', a convenient boat ramp, boat trailer storage, a resort-style pool, tiki hut, clubhouse, and a scenic paved walkway leading to a tranquil jetty point--ideal for sunset strolls or simply soaking in the coastal beauty. Positioned in one of the most desirable and private locations within Lion's Lair, this home offers both seclusion and easy access to all amenities. With low association fees of just $1,500 per year and no rentals allowed, you'll enjoy a peaceful, owner-focused environment without the disruption of short-term vacation traffic. This is more than a home--it's a rare opportunity to own a piece of paradise in a premier waterfront setting. Schedule your private showing today.

58950 Overseas Highway Unit 48, Marathon
$899,000
2 Beds ⋅ 2 Baths ⋅ 618501 MLS
Charming 2 bedroom, 2 bathroom half duplex in Marathon with highly desirable 7-day rental flexibility. Located just four properties from the Atlantic Ocean, this stilted home offers 35 feet of seawall and quick boating access to open water. Interior upgrades include bamboo hardwood flooring, new carpeting in bedrooms, a renovated kitchen with granite countertops, updated bathrooms, and new interior doors, jambs, and trim. Extensive exterior improvements include a foam and coating roof, full electrical rewire to current code, structural column repairs with stucco restoration and exterior paint, two new exterior doors, new front and street-side railings, and replacement of water lines. Elevated construction provides covered parking for multiple vehicles and ample space for trailers, boats, or outdoor gear. Ideal as a primary residence, vacation getaway, or income-producing property in the heart of the Florida Keys near beaches, dining, and local amenities.

668 89th St, Marathon
$990,000
4 Beds ⋅ 2 Baths ⋅ 618176 MLS
Solid CBS full duplex in the heart of Marathon, set on an oversized 10,000 sq. ft. lot with mature native trees for added shade and privacy. Built for strength and long-term value, this elevated stilted property features concrete construction, a concrete roof, impact windows, newer HVAC systems, and four covered parking bays below. Each unit has been fully remodeled with gray faux wood flooring, granite countertops, stainless steel appliances, and clean modern finishes. The property has a strong income history, previously grossing approximately $69,000 annually, with one side currently left vacant for easy showings. Ideal for investors, employee housing, or living in one unit while renting the other, this duplex offers flexibility, usable outdoor space, covered parking, storage potential, and a central Marathon location close to shopping, dining, marinas, beaches, and daily conveniences.

1306 &1308 & St, Marathon