A newly completed estate in Marathon’s Florida Keys is listed for $27.5 million, offering an unusual combination of scale, privacy and direct ocean access. Set on 1.7 acres of Fat Deer Key, the never-occupied property brings resort-level amenities, expansive interiors and a rare stretch of unobstructed beachfront to one of Florida’s most tightly constrained coastal markets.
Key takeaways
- The 18,736-square-foot estate is listed for $27.5 million.
- The property includes nine bedrooms, 9.5 bathrooms and a separate three-bedroom guest residence.
- Its 1.7-acre site has 200 feet of beachfront and multiple pools.
- A nearby 60-foot boat slip and airport access support a resort-style island lifestyle.
The home’s combination of interior space, acreage and ocean frontage is particularly notable in the Keys, where land is limited and new residential construction is closely regulated. The property is nearly twice the size of the next-largest luxury home cited in the local market.
A rare scale for the Florida Keys
Located at 2405 Coco Plum Drive, the estate occupies a peaceful waterfront setting in Marathon, a community spread across several islands in the Middle Keys. Its 18,736 square feet of living space gives the residence a scale more commonly associated with a private resort than a coastal retreat.
The design emphasizes openness while maintaining distinct living areas. Soaring ceilings and sweeping twin staircases create a grand arrival, while a predominantly white interior palette keeps attention focused on the tropical landscape beyond the glass.
Architecture centered on the ocean
Walls of sliding glass connect the interior with the Atlantic, allowing natural light, sea air and changing water views to become part of the home’s atmosphere. Turquoise tones from the ocean provide the strongest color throughout many of the main living spaces.
Despite its monumental proportions, the residence is designed to preserve a close relationship with the water. Nearly every major area offers a view toward the ocean, reinforcing the property’s central appeal: expansive luxury shaped around island living.
Resort-style outdoor amenities
The outdoor spaces are designed for entertaining and extended stays. A 100-foot infinity pool stretches toward the Atlantic, accompanied by a separate beach-entry pool, a spa and broad waterfront terraces.
The estate also provides substantial practical capacity, including parking for up to nine vehicles. A 60-foot boat slip at a nearby marina offers access to the water without placing a dock directly across the property’s beach frontage.
Built for guests and island recreation
Nine bedrooms and 9.5 bathrooms allow the main residence to accommodate large groups, while a separate three-bedroom guest home offers additional privacy. The layout is suited to family gatherings, multigenerational visits or hosting guests without sacrificing personal space.
Marathon is known for boating and sport fishing, and Sombrero Reef lies offshore for snorkeling and marine exploration. The home is also about a five-minute drive from Marathon’s airport, making the remote-feeling setting relatively convenient to reach.
Land may be the ultimate luxury
The estate’s most valuable feature may be the opportunity to build at this scale in the Florida Keys. Much of the region’s waterfront has already been developed or divided into smaller parcels, while environmental and coastal-development restrictions limit future projects.
For buyers seeking a private compound with resort amenities, substantial beachfront and direct access to the island lifestyle, the property represents a rare convergence of features—one that may be increasingly difficult to reproduce.