Marathon Beach (49.0) Real Estate, Homes, Condos for Sale in Marathon, FL

5 Beds ⋅ 6 Baths ⋅ 621988 MLS

Luxury 5-Bedroom Waterfront Home in the Florida Keys Welcome to your dream retreat in Marathon, Florida! This stunning 5-bedroom, 5.5-bath residence sits on the desirable bay side, offering breathtaking water views and endless sunsets. Perfectly designed for comfort and entertaining, the home features an open-concept living space, gourmet kitchen, and spacious bedrooms with en-suite baths for ultimate privacy. Step outside to enjoy resort-style living with a sparkling pool, expansive patio, and direct access to the bay. Boating enthusiasts will love the assigned dock slip, making days on the water effortless. Whether you're seeking a full-time residence, vacation getaway, or investment property, this home delivers the ultimate Keys lifestyle--luxury, relaxation, and adventure right at your doorstep.

990 41st St Unit 9, Marathon

$1,450,000

621987 MLS

Vacant Bay Side Lot with Dock Slip - Marathon, FL. Build your dream home in the heart of the Florida Keys! This vacant lot on the bay side offers a rare opportunity to create your own tropical retreat. Enjoy direct access to the water with an assigned boat dock slip - perfect for boating, fishing, and soaking in stunning Keys sunsets. Located in a desirable Marathon community, this property combines convenience with the unmatched beauty of island living. Whether you're planning a full-time residence, vacation home, or investment property, this lot provides the perfect foundation for your vision.

990 41st St Unit 8, Marathon

$2,950,000

5 Beds ⋅ 6 Baths ⋅ 621813 MLS

Luxury 5-Bedroom Waterfront Home in the Florida Keys Welcome to your dream retreat in Marathon, Florida! This stunning 5-bedroom, 5.5-bath residence sits on the desirable bay side, offering breathtaking water views and endless sunsets. Perfectly designed for comfort and entertaining, the home features an open-concept living space, gourmet kitchen, and spacious bedrooms with en-suite baths for ultimate privacy. Step outside to enjoy resort-style living with a sparkling pool, expansive patio, and direct access to the bay. Boating enthusiasts will love the assigned dock slip, making days on the water effortless. Whether you're seeking a full-time residence, vacation getaway, or investment property, this home delivers the ultimate Keys lifestyle--luxury, relaxation, and adventure right at your doorstep.

990 41st St Unit 10, Marathon

$1,450,000

621812 MLS

Vacant Bay Side Lot with Dock Slip - Marathon, FL Build your dream home in the heart of the Florida Keys! This vacant lot on the bay side offers a rare opportunity to create your own tropical retreat. Enjoy direct access to the water with an assigned boat dock slip--perfect for boating, fishing, and soaking in stunning Keys sunsets. Located in a desirable Marathon community, this property combines convenience with the unmatched beauty of island living. Whether you're planning a full-time residence, vacation home, or investment property, this lot provides the perfect foundation for your vision.

990 41st St Unit 7, Marathon

$2,490,000

4 Beds ⋅ 4 Baths ⋅ 621438 MLS

Welcome to Emerald Flats, an exclusive gated waterfront community in the heart of Marathon, where sophisticated coastal design and the Florida Keys lifestyle come together effortlessly. Designed & Built by D'Asign Source, this beautifully furnished 4-bedroom, 4-bath residence was completed in 2025 and offers 2,805 square feet of refined living space, thoughtfully designed for both relaxed everyday living and memorable entertaining. High ceilings, abundant natural light, impact-rated windows and doors, and a metal roof complement the home's fresh, modern construction. The interiors are light, airy, and beautifully curated in an elevated coastal palette. At the heart of the home, the designer kitchen pairs quartz countertops, KitchenAid stainless steel appliances, crisp white cabinetry, statement lighting, and an oversized waterfall-edge island with generous seating. A separate bar and entertaining area adds another layer of functionality, while the open-concept layout flows seamlessly into the dining and living spaces. Expansive glass doors invite the outdoors in and open to spacious covered balconies overlooking the Gulf, creating an exceptional setting for morning coffee, sunset cocktails, or simply enjoying the tropical surroundings. The bedrooms are equally inviting, with private balcony access in select rooms and beautifully appointed baths featuring quartz surfaces, glass-enclosed showers, and custom tile details. Boating is an effortless part of the lifestyle with Boat Slip #29 included, measuring approximately 45 feet long by 14.75 feet wide, providing convenient private docking just moments from home. Fully furnished and move-in ready, this exceptional Emerald Flats residence offers the perfect blend of luxury, waterfront living, modern comfort, and easy access to everything that makes Marathon so special. Bring your suitcases, your boat, and start living the Keys lifestyle from day one.

815 39th St, Marathon

$2,390,000

5 Beds ⋅ 4 Baths ⋅ 621439 MLS

Welcome to Emerald Flats, a gated waterfront enclave in the heart of Marathon where refined coastal design meets the Florida Keys lifestyle. Designed & Built by D'Asign Source, this beautifully furnished 5-bedroom, 4-bath residence was completed in 2025 and offers 2,565 square feet of thoughtfully designed living space, with high ceilings, an open-concept layout, impact-rated windows and doors, and a metal roof. Elevated on concrete pilings, the home is designed for both style and durability while creating generous covered space beneath the residence. Inside, the light-filled living areas showcase a sophisticated coastal aesthetic with seamless flow between the kitchen, dining, and gathering spaces. The kitchen is a true centerpiece, featuring quartz countertops, KitchenAid stainless steel appliances, crisp white cabinetry, a striking waterfall-edge island, and generous seating and prep space. Expansive glass doors open to covered balconies, extending the living space outdoors, while a separate bar and entertainment area adds another polished touch for hosting family and friends. Outdoor living is equally impressive, with a private heated pool, tropical landscaping, expansive paver areas, and multiple covered spaces ideal for relaxing or entertaining. Boaters will appreciate the included Boat Slip #30, reported to measure approximately 45 feet long by 14.75 feet wide, offering convenient private docking within the Emerald Flats Marina community. The slip is separately identified by Monroe County as a marina condominium boat-slip parcel. Fully furnished and move-in ready, this home offers an exceptional combination of luxury, boating access, modern construction, and effortless island living in one of Marathon's desirable waterfront communities.

818 39th St, Marathon

$3,795,000

5 Beds ⋅ 4 Baths ⋅ 620953 MLS

NEW CONSTRUCTION | FULLY FURNISHED | 45' BOAT SLIP | OPEN GULF VIEWS Experience elevated Florida Keys living in this newly constructed, fully furnished 5-bedroom, 4-bath waterfront residence in the exclusive gated community of Emerald Flats. Perfectly positioned with unobstructed open Gulf views and no rear neighbors, this exceptional home combines privacy, luxury, and outstanding boating access. Designed to maximize its spectacular waterfront setting, the home features two primary suites, each opening to a full-length deck with breathtaking sunrise and open-water views. Enjoy seamless indoor-outdoor living with a private pool, sandy beach area, and deeded 45' boat slip offering protected deep-water dockage just steps from your door. Home is prepped with an elevator shaft which currenly offers locking owners/ additional storage. Beautifully appointed and offered completely turnkey, the residence is currently operating as a successful vacation rental with an established rental history, providing the opportunity for immediate income while still serving as an exceptional personal retreat. Ideally located in the heart of Marathon, just minutes from world-class fishing, seconds from 7 mile bridge, boating, waterfront dining, beaches, and everything the Florida Keys lifestyle has to offer. A rare opportunity to own a new-construction, turnkey Gulf-front home with spectacular open-water views, dual primary suites, exceptional boating access, and income potential.

813 39th St Gulf St, Marathon

$300,000

619982 MLS

800 39th St Unit 1, Marathon

$400,000

619939 MLS

Boater's dream in an unbeatable location! This deep-water 70' boat slip sits directly on the Gulf of America with immediate access to open water -- no canals and no long idle time. Be at the fishing grounds or your favorite sandbar within minutes. The iconic Seven Mile Bridge is just 2 miles away, providing quick and convenient access to the Atlantic Ocean as well. Located in a secure gated community, Slip #3 is just a short walk from the designated parking area and includes access to the boathouse restroom facilities. Trailer parking is available, along with electric and water service at the slip. Community amenities include a private sandy beach area and locked gated entry. Bumpers and a fish-cleaning station are already installed, making this slip completely boat-ready and turnkey for your next adventure.

800 39th St Unit 3, Marathon

$499,000

619735 MLS

Discover a rare opportunity to own a deep water boat slip at Emerald Flats in Marathon, FL. Slip 2 measures approximately 75' x 22.9' and is the only slip that includes a separate deeded on-site tackle room, offering convenient extra storage for gear and supplies. The tackle room measures approximately 11' x 13' and features key-lock access and a 3-point hurricane impact door for added security and durability. Ideally located in the heart of the Florida Keys and directly on the open Gulf, this slip is within walking distance to restaurants, Marathon Community Park, and a variety of water activities. Sombrero Beach, Bahia Honda State Park, Islamorada, and Key West are all just a short drive away, making this an exceptional home base for enjoying everything the Keys have to offer. Amenities at Emerald Flats include on-site parking, secure gated access, bathroom facilities, water and electric at each slip, a sandy beach area, a concrete seawall, and newly built finger piers. Temporary overnight stays may be permitted with board approval for periods under 72 hours, with no more than 6 days per month, subject to association rules. Boat lifts are permitted with separate purchase and proper permitting. Whether you are looking for convenient boating access, a well-located slip, or a great way to enjoy the Keys lifestyle, Slip 2 offers an outstanding opportunity in a prime Marathon location.

800 39th St Unit 2, Marathon

$195,000

619191 MLS

Deep water boat slip for sale at Emerald Flats in Marathon, FL! Ideally located in the heart of the Florida Keys, Slip 21 is within walking distance to restaurants, Marathon Community Park, and water activities, with Sombrero Beach, Bahia Honda State Park, Islamorada, and Key West all just a short drive away. Amenities include on-site parking, gated man-gate access, bathroom facilities, water and electric at each slip, a sandy beach area, concrete seawall, and newly built finger piers. Boat lifts are allowed with separate purchase and permitting. A great opportunity to enjoy convenient boating access in a prime Keys location.

800 39th St Unit 21, Marathon

$4,500,000

5 Beds ⋅ 5 Baths ⋅ 617129 MLS

LOCATION LOCATION LOCATION DIRECTLY ON THE GULF OF AMERICA! Welcome to 810 39th Street Gulf, a stunning new 2024 Gulf-front home in Emerald Flats, an exclusive gated community of just 18 residences. Built by the Keys' premier builder D'Asign Source, this three-story concrete block home with concrete subfloors combines strength, design, and luxury in every detail. Featuring 5 bedrooms and 5 baths, this residence offers a bright open layout with panoramic Gulf views through walls of glass. The private elevator connects all levels, and the interior showcases a chef's kitchen with premium appliances, quartz counters, and a full wet bar for effortless entertaining. The outdoor space is pure paradise with a resort-style pool, hot tub, and sunshelf, all positioned perfectly to enjoy both sunrises and sunsets from the home's ideal north-facing exposure. Boaters will love the private 50' boat slip with deep-water access, plus additional slips available if needed. The expansive garage and tackle area provides ample storage and includes an industrial refrigerator and freezer, ideal for fishing and boating enthusiasts. The home also offers three washers and three dryers, lockable owner's closets, and a proven record as a profitable vacation rental, with future bookings that can be retained or released by the buyer. Designed and built for low-maintenance, luxury coastal living, this home combines elegant finishes, enduring construction, and unmatched functionality. Whether as a primary residence, family retreat, or high-performing investment, 810 39th Street Gulf delivers the ultimate Florida Keys lifestyle—new construction, deep-water access, and breathtaking open-water views in one of Marathon's most desirable Gulf-front settings.

810 39th St, Marathon

$2,755,000

5 Beds ⋅ 4 Baths ⋅ 613480 MLS

Emerald Flats, a D'Asign Source development, situated in the heart of the Florida Keys within walking distance to restaurants, Marathon Community Park, and various water activities, while a short drive to Sombrero Beach, Bahia Honda State Park, Islamorada or Key West. Brand new CBS construction home in new gated development, with open concept kitchen, dining and living room including Quartz Countertops and KitchenAid appliances including a bar with beverage/wine refrigerator. Master bedroom with en suite bath and balcony with water views, as well as Junior Master with en suite and gorgeous marina views. Concrete in ground pool and site/ landscaping are included. Furniture and AV package are included. Boat slip available for additional $45K upgrade, slip size is 46.5' in length and 13' wide in the marina basin area.

814 39th St Gulf St Unit 14, Marathon

$1,500,000

606932 MLS

This incredible elevated 38,000 sq. ft. corner property with 200 feet of Overseas Highway frontage is zoned mixed use and can accommodate numerous development opportunities. The lot is enclosed with fill, a CBS retaining wall, and topped with a CBS fence. This unique large lot provides plenty of height and space to add offices or other buildings with adequate parking area. The lot was filled and graded to provide protection from rising water levels. A 2016 Elevation Certificate showed the Flood Zone as AE 8 and the lowest adjacent finish grade next to the building in back of the lot to be at 8.1 ft. After Hurricane Irma in 2017 the lot had only 3 palm fronds to remove. The lot includes most of the right-of-way along Overseas Highway which helps in getting approval for a second entrance on Overseas Highway, if needed. (Contact the City of Marathon for details.) Remember commercial buildings do not require TBR's, and the City of Marathon has commercial sq. ft. space available. The 850 sq. ft. office situated toward the back of the lot should enhance any business you are planning. Added features of the office include two office spaces, break room, storage area, 1 ½ baths, generator with 2000-gallon propane tank, handicap ramp and parking area. There is a second water meter for irrigation. Call today for a showing to see this spacious mixed-use property. Please do not walk the property without the listing agent.

4000 Overseas Hwy, Marathon

$300,000

598661 MLS

City of Marathon Transferable Building Rights (TBRs) that require NO $20K TRANSFER FEE. Transfer of TBR's will be contingent on approval of Buyer's Receiver Site by the City of Marathon. Buyer to pay all closing costs (see costs in Documents section)

Br 39th St, Marathon

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