1 E Sister Rck Is, Marathon
#MLS: A12069701
$ 16 000 000
Listing date08/12/2026
CityMarathon, FL 33050
Address1 E Sister Rck Is
Area2880 sqft
Tax/year$ 25 482
Built year2015
Bedrooms4
Bathrooms3
Waterfront
1 E Sister Rck Is, Marathon FL 33050
Welcome to Off Shore Island, a rare private island estate in Marathon, Florida. Located in the Off Shore Island subdivision of Monroe County, this detached, one-story single-family residence was built in 2015 and offers unmatched privacy just a quarter mile offshore.
The property spans approximately 6.5 acres, including about 5.8 acres of surrounding seabed, with direct ocean views and ocean access along navigable, oceanfront waters. The updated three-bedroom, two-bath main home and detached guest house provide more than 5,000 square feet of combined living and entertaining space, while the main residence includes 2,304 square feet of living area. A wide wraparound veranda, family room, first-floor entry, built-in features, closet cabinetry, and a thoughtful split-bedroom layout create a comfortable setting for everyday living and memorable gatherings.
Enjoy a waterfront pool and spa, tropical landscaping, exterior lighting, fruit trees, outdoor entertaining areas, and a 100-foot deep-water dock. The island also features boating access, a private helipad, solar and wind power, battery storage, backup generator, desalination, and freshwater cistern capacity. Central air, solar and fireplace heating, plus a well-equipped kitchen with wall oven, electric range, microwave, refrigerator, dishwasher, washer, dryer, trash compactor, solar hot water, and other appliances add convenience. Parking is not available on-site.
Marathon offers the relaxed Florida Keys lifestyle, while Miami adds world-class dining, shopping, nightlife, cultural attractions, excellent infrastructure, warm weather, and easy access to beautiful beaches.
For details or a private showing, call or WhatsApp +1 786.468.4380. Ask about 1 E Sister Rck Is, Marathon FL 33050 and select joint venture opportunities.