Experience luxury waterfront living in this custom-built, new construction two-story concrete home featuring 4 bedrooms and 4 private en-suite baths. Designed for entertaining, the open-concept layout seamlessly blends indoor and outdoor living. The chef's kitchen boasts top-of-the-line stainless steel appliances including double convection ovens, Smart refrigerator, dishwasher, vented range hood, prep sink, wine chiller, quartz countertops, custom cabinetry, and a large island. Porcelain tile flooring, custom fixtures, LED lighting, and abundant natural light enhance every space. A first-floor en-suite bedroom offers balcony access overlooking the pool, dock, and water. The dramatic floating staircase with custom LED chandelier leads to three additional en-suite bedrooms upstairs. The primary suite features a floating soaking tub, double vanity, custom porcelain tile shower, and MOEN programmable multi-head shower system with smartphone controls. Additional features include impact windows and doors, web-enabled security camera system, 4K Smart TVs in every room, 8-foot interior doors, two 3-ton 16 SEER A/C units, standing seam metal roof, aluminum railings, and expansive balconies on both levels. Situated on an oversized 11,319 sq. ft. corner lot, the property includes a 12' x 26' pool with custom pavers, two stairways to the outdoor living area, and a 36 foot dock completed in January 2024. Located in the desirable Flamingo Island neighborhood of Marathon, just minutes from Sombrero Beach, dining, shopping, and entertainment. Enjoy quick access to open water, world-class fishing, boating, diving, and the crystal-clear turquoise waters of the Florida Keys. Built to impress and built to last, this exceptional waterfront retreat offers the ultimate Florida Keys lifestyle. Adjacent property at 837 Copa D'Oro is also available, featuring an 8,200 sq. ft. lot and 50-foot dock.