Private Island in the Florida Keys With Helipad and Solar Power Lists For $16 Million
Positioned just off the coast of Marathon, East Sister Rock Island is a rare private sanctuary wrapped in vibrant turquoise waters—accessible by boat or via a private, on-island helipad has hit the market for $16 million. A once in a generation opportunity to own a legacy property, the island spans approximately 6.5 total acres—including 5.8 acres of private surrounding seabed– offering an extraordinary aquatic playground.
Positioned just off the coast of Marathon, East Sister Rock Island is a rare private sanctuary wrapped in vibrant turquoise waters—accessible by boat or via a private, on-island helipad has hit the market for $16 million.
A once in a generation opportunity to own a legacy property, the island spans approximately 6.5 total acres—including 5.8 acres of private surrounding seabed– offering an extraordinary aquatic playground for snorkeling, swimming, kayaking, paddleboarding, fishing, and exploring the pristine waters of the Florida Keys.
At the island's heart is an updated 3-bedroom, 2-bath main residence alongside a separate guest house, offering over 5,000 square feet of refined living space. The interior highlights a chef-inspired kitchen adorned with premium countertops and contemporary finishes, while a 12-foot-wide wraparound veranda delivers sweeping, panoramic ocean vistas, breathtaking Atlantic sunrises, and iconic Keys sunsets.
Resort-style outdoor living features a waterfront pool and spa, lush tropical landscaping, dedicated alfresco lounging and dining venues, helipad, and a 100-foot deep-water dock accommodating multiple vessels.
Engineered to be eco-friendly and fully self-sufficient, East Sister Rock is powered by solar and wind systems with battery storage, a backup generator, a desalination system, and ample freshwater cistern capacity. The offering includes 99 E Ocean Drive on the mainland which includes private dock space.
1 East Sister Rock Island in Marathon, Florida Keys is listed for $16 million by Vladimir Rochebrun & Aaron Rosenthal with The Chad Carroll Group at Compass.
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Constellation Group and Ironwood Venture Group Complete Seaglass Cove In The Florida Keys
Constellation Group and Ironwood Venture Group have completed SeaGlass Cove, a 14-residence oceanfront community in Marathon, and the closing of an $8.46 million permanent loan from Centennial Bank. The financing replaces the project’s construction loan and marks SeaGlass Cove’s transition from development to a fully completed, move-in-ready residential community. With seven residences sold and seven remaining, the project is now 50% sold.
Constellation Group and Ironwood Venture Group have completed SeaGlass Cove, a 14-residence oceanfront community in Marathon, and the closing of an $8.46 million permanent loan from Centennial Bank. The financing replaces the project’s construction loan and marks SeaGlass Cove’s transition from development to a fully completed, move-in-ready residential community. With seven residences sold and seven remaining, the project is now 50% sold.
Set along the Atlantic Ocean, SeaGlass Cove features 14 three-story residences offering more than 4,800 square feet of indoor-outdoor living space with sweeping water views. Four- and five-bedroom floor plans include expansive great rooms, chef’s kitchens, spa-inspired bathrooms, generous owner and guest suites, private cabanas, covered terraces and two-car garages. Thoughtfully landscaped grounds connect the residences to a private white-sand beach, resort-style pool and community pickleball court.
Seven move-in-ready residences remain available for sale, including four turnkey furnished homes, one of which was professionally designed by award-winning luxury interior design firm Interiors by Steven G. Prices begin at $3 million.
The furnished residences allow buyers to begin enjoying the community immediately, while the ability to rent on a weekly basis provides additional flexibility for owners when they are not in residence.
“Now that SeaGlass Cove is complete, buyers and brokers can experience the full ‘barefoot-luxury’ vision firsthand—from the architecture, interiors and landscaping to the beach and waterfront amenities,” said Eduardo Otaola, Managing Principal of Constellation Group. “The response from those touring the finished community has been exceptional. With half of the residences sold, several turnkey homes available and the flexibility of weekly rentals, SeaGlass Cove offers a rare combination of immediate enjoyment, elevated design and ownership flexibility in the Florida Keys.”
The $8.46 million permanent financing from Centennial Bank closed following completion of construction and replaced the project’s construction financing. The transaction reflects SeaGlass Cove’s progression from active development to a completed residential community and provides a long-term financing structure as the project enters its next phase of sales and operations.
“SeaGlass Cove is a distinctive, well-executed development supported by experienced sponsors and the continued strength of the luxury residential market in the Florida Keys,” said David Druey, Regional President of Centennial Bank. “We are pleased to provide permanent financing and support Constellation Group as the completed community enters its next chapter.”
The residences pair Stone International cabinetry and KitchenAid appliances with spacious, functional layouts designed for effortless indoor-outdoor living. Expansive great rooms open to covered terraces, while private cabanas and outdoor living areas overlook the water. The architecture, interiors, landscaping and material palette have been carefully coordinated to create a cohesive resort-residential experience throughout the community.Located in the heart of the Florida Keys, residents enjoy access to a private white-sand beach, resort-style pool, pickleball court and a wide range of nearby boating, fishing, paddleboarding, snorkeling and other water activities.
SeaGlass Cove is located near Hawks Cay Resort and Marina, Coffins Patch Reef—known for its coral formations and lobstering—and The Lagoon, a popular destination for wakeboarding and other water-based recreation. Nearby marinas, restaurants, shops and natural beaches further enhance the relaxed, waterfront Florida Keys lifestyle.SeaGlass Cove is approximately 20 minutes south of Islamorada and offers convenient access to the Florida Keys/Marathon International Airport and the Overseas Highway, connecting residents to destinations throughout the entire Florida Keys.
SeaGlass Cove is located at 59720 Overseas Highway, Marathon, FL 33050.
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Private Florida Keys Resort Style Luxury Home Community SeaGlass Cove Passes $21 Million in Sales
Constellation Group, the Miami-based commercial real estate investment and development firm, and Ironwood Venture Group, a real estate development firm, have sold over $21 million combined of the residences at SeaGlass Cove, a new lush, private enclave consisting of just 14 single-family homes in Marathon.
Constellation Group, the Miami-based commercial real estate investment and development firm, and Ironwood Venture Group, a real estate development firm, have sold over $21 million combined of the residences at SeaGlass Cove, a new lush, private enclave consisting of just 14 single-family homes in Marathon, Fla., in the heart of the Florida Keys. Buyers have been a mix of end users intending to reside at the community, and investors seeking passive income through short term rentals. The first three homes of the oceanfront development, where residences start at in the low $3 million range, are slated for completion in March 2024.
"The extraordinary sales success is a testament to the rising demand for new construction oceanfront properties, especially those allowing weekly rentals, as well as SeaGlass Cove’s design and appealing architecture emphasizing, intimacy, exclusivity, and the laid-back luxury lifestyle that celebrates the best of the Florida Keys,” said Eduardo Otaola, Principal at Constellation Group. “It’s a highly unique blend of barefoot luxury meets carefree oceanfront living.”
Located at 59720 Overseas Highway in Grassy Key, SeaGlass Cove’s residences are nestled amongst colorful coves and turquoise waters in a private gated community. Comprised of approximately 5,000 square feet of living and entertainment space, each three-story residence offers stunning views of the Atlantic Ocean, as well as chef’s kitchens and spa baths that will be luxuriously appointed with designer finishes and appliances. Additional highlights include rare two-car garages, private covered cabanas, fire pits, and summer kitchens replete with beach access.
“New construction luxury oceanfront residences in the heart of the Florida Keys are a true rarity given the difficult entitlement landscape and the strict building codes that these homes have to adhere to,” said Everett Atwell, Managing Director of Ironwood Venture Group. “Our buyers understand the unprecedented appeal and value proposition this project offers, especially when considering the short-term rental component that allows for passive income.”
The oceanfront enclave features a myriad of resort-style amenities, including a pool overlooking the ocean, a private on-site pickleball court, and activities that include paddleboarding, swimming, fishing, snorkeling, biking, and much more from the property’s private beach. SeaGlass Cove is minutes from fine dining, shopping, spas, marinas, and much more.
The property is 20 minutes South of Islamorada, is close to Florida Keys/Marathon International Airport, and offers convenient access to Overseas Highway, which spans the entire chain of the Keys, and over the Atlantic Ocean, Florida Bay, and the Gulf of Mexico.
Positioned just off the coast of Marathon, East Sister Rock Island is a rare private sanctuary wrapped in vibrant turquoise waters—accessible by boat or via a private, on-island helipad has hit the market for $16 million. A once in a generation opportunity to own a legacy property, the island spans approximately 6.5 total acres—including 5.8 acres of private surrounding seabed– offering an extraordinary aquatic playground.