luxury seaside houses for sale Marathon, United States

Join us for Brokers Open House today 4-6 pm! This stunning, fully renovated waterfront home in Key Colony Beach offers the ultimate Florida Keys lifestyle, combining high-end finishes with practical, top-tier enhancements for durability and comfort. Step into a bright, open-flow sanctuary anchored by wood-look tile flooring and crisp custom shiplap walls. The heart of the home is a culinary showpiece, featuring an expanded island with hand-selected quartzite countertops, a farmhouse sink, and an instant hot water system. The sunroom offers an elevated retreat with its tongue-and-groove ceiling, while the bathrooms have been transformed with sleek barn-door glass showers and designer finishes. Designed for the elite boater, the outdoor oasis features a 15,000 lb boat lift and a newly replaced dock (2026). The backyard is a private tropical resort, finished with limestone pavers, a composite raised deck, and a brand-new tiki hut. For the dedicated angler, the garage is thoughtfully equipped with a commercial-grade ice maker and a dedicated bait freezer, ensuring you are always ready for a day on the reef. Every inch of the property has been modernized, from the hurricane impact glass that frames every view to the all-new PVC sewer infrastructure installed in 2023. The saltwater pool is optimized for year-round perfection with a dedicated heater and chiller, while new landscaping and privacy palms create a secluded sanctuary. A circular paver driveway and an expanded outdoor storage closet provide the final touches of convenience to this masterpiece. Call today for your private tour! No sign on the property.

Motivated Sellers want you to experience the sweeping ocean views and breathtaking sunsets, from both floors of this beautifully updated oceanfront residence in Key Colony Beach--the gem of the Florida Keys. The spacious primary suite features an extended living area on the enclosed balcony with amazing blue water & sunset views, a custom bath, and generous walk-in closet. Two large guest bedrooms offer comfort and privacy for family or visitors. The gourmet kitchen boasts abundant cabinetry, stunning granite countertops, and opens to a light-filled living and dining area complete with a wet bar and panoramic ocean vistas--perfect for entertaining. This home suits any lifestyle: a high-performing vacation rental, a seasonal retreat for snowbirds, or a full-time residence in a meticulously maintained community of just 31 condos and townhomes. Enjoy resort-style amenities including a large oceanfront pool surrounded by expansive sun decks, a fishing pier with breathtaking sunset views, grilling and private lounging areas, covered parking garage, bike and kayak storage, plus guest parking, shuffleboard, and tennis/pickleball courts. Ideally located near marinas, restaurants, shopping, and local attractions, your island dream awaits in paradise.

Boating enthusiasts check out this open water view of Shelter Bay with a private cut in boat slip, and two boat lifts! Two story 5-bedroom, 3-bath pool home located in Key Colony Beach, Florida Keys! Designed to capture the beauty of waterfront living, this spacious home features soaring ceilings in the main living area, creating an open and airy atmosphere filled with natural light. Relax and enjoy the breathtaking water views from the lovely sun porch, expansive outdoor patios, or poolside lounging areas designed for entertaining family and guests. Boaters will appreciate the easy boating access, private dockage, and dual boat lifts, making days on the water effortless. The thoughtfully designed split-bedroom floor plan offers privacy upstairs, while two additional bedrooms downstairs provide ample accommodations for guests or extended family. Additional highlights include two separate garages, an elevator for convenience, generous outdoor seating and lounging areas, and close proximity to the Par-3 golf course and the many amenities offered by the City of Key Colony Beach, including tennis, pickleball, parks, and more. Exceptional open water views, outstanding boating access, and resort-style amenities combine to create an unforgettable Florida Keys waterfront lifestyle.

Rare opportunity to secure a prime waterfront homesite on highly desirable Duck Key. This is presenting the perfect canvas to design and build a custom island retreat exactly to your vision. Even better, the property is ROGO exempt, meaning no waiting for a new building permit -- a verified build right is already in place (letter on file). Boaters will appreciate the 82 feet of dockage, deep water dockage and exceptionally quick ocean access. Two davits that are 5,500 lbs each one and a turner on one of them. Center Island is a prime location for privacy on Duck Key. Navigate under the Seaview Bridge and head out through the Headpins for fast access to open water, or take the main channel route for larger sportfishing vessels. Enjoy all the lifestyle perks Duck Key is known for, including nearby dining at Hawks Cay Resort, a welcoming island community. that is golf cart friendly. Fly into Marathon airport with your own plane or Million Air and then drive 15 minutes to your island oasis. Whether you're planning a full-time residence or luxury vacation escape, this is your chance to build your dream home in one of the Florida Keys' most sought-after boating enclaves.

Experience refined oceanfront living on sought-after Duck Key. This double lot estate offers 138 feet of protected deepwater dockage, complete with a solid concrete seawall designed to accommodate a sportfishing yacht, multiple center consoles, and all of your waterfront lifestyle needs. A true boater's paradise, this property offers both privacy and exceptional access to the Atlantic Ocean. The fully remodeled residence is constructed of concrete with a new roof. Inside, seven spacious bedrooms and six bathrooms provide ample accommodations for family and guests. Coastal-inspired interiors feature wood-look tile flooring throughout, woven statement light fixtures, and soaring ceilings with exposed beams and pecky cypress accents. Expansive impact windows and doors frame sweeping ocean views, bringing natural light into nearly every room. The gourmet kitchen anchors the main living space as the heart of the home, with a striking 12' island that creates the perfect setting for gatherings. Outfitted with top-of-the-line appliances, this space is equally suited for everyday living with family or hosting unforgettable evenings of entertaining. Spa-like marble bathrooms further elevate the home, blending comfort with luxury. Designed for both style and function, the property also offers a rare 4+ car garage and abundant storage. Outdoors, a sparkling pool invites afternoons in the sun, while the expansive double lot offers unmatched opportunities for expansion. Whether envisioning a private guest house, a tennis or pickleball court, or exploring the option to build and sell, this rare property provides endless possibilities for both personal enjoyment and investment potential—an uncommon luxury in the Florida Keys. Balancing modern sophistication with coastal simplicity, this sanctuary captures the essence of waterfront living from sunrise over the Atlantic to evenings by the water, in one of the most desirable neighborhoods in the Florida Keys.

An unparalleled development opportunity in the heart of the Florida Keys. Spanning approximately 10 acres, this expansive bayfront property represents one of the largest and most versatile land offerings currently available in the Middle Keys. There are two newer construction homes (4 bedrooms/4.5 bathrooms each), 8 additional building rights (7 waterfront lots, 1 dry lot), 16 deep water boat slips in a protected basin (6 with boat lifts) and a total of 10 acres of land conveyed with the sale. The property offers exceptional flexibility for a luxury compound, secluded waterfront community or private family retreat. The 2 current homes sit on 5,200 SF lot each featuring 4 bedrooms/4.5 bathrooms with a total interior square footage of 3,300. Each has their own private pool & spa, unobstructed bay views, garage, Thermador appliances & marble kitchen countertops, impact doors & windows & designed to embrace the island lifestyle. The estate balances seclusion with convenience just minutes from Marathon Executive Airport for effortless fly-in, fly-out access. As well as seamless access to both the bay & ocean side waters via Long Key Bridge or Channel 5. The setting is defined by endless sunsets, abundant wildlife, and world-class boating & fishing just steps from your door. Whether envisioned as a multigenerational retreat, a private waterfront sanctuary or a visionary redevelopment, this legacy property offers the space, flexibility & natural beauty to bring a dream to life.