This private, world-class waterfront estate owned by the family of Formula One World Champion Nigel Mansell sits within the exclusive double-gated enclave of Belleview Island. Pole positioned on a rare double lot, the property offers breathtaking panoramic views of Clearwater Harbor and the historic Donald Ross-designed Belleair Golf and Country Club, Florida's first golf course. A true boater's paradise, the protected cove features a custom dock with a jet ski lift, along with 60,000 lb. and 80,000 lb. boat lifts, providing quick and direct access to Clearwater Pass and the Gulf of America. Inside, the custom-built residence showcases refined craftsmanship and elegant living spaces. A grand, custom staircase introduces the home and opens into an expansive great room designed for sophisticated entertaining, complete with a dining area, wet bar, custom built-ins, and sweeping water views. The gourmet kitchen offers a large island, custom cabinetry, granite countertops, a butler's pantry, and a charming breakfast room overlooking both the bay and golf course. The second floor is a private retreat featuring a luxurious primary suite with its own balcony, vaulted ceilings, fireplace, and dual spa-caliber bathrooms-one with a walk-in shower and the other with a whirlpool tub-plus two walk-in closets. Three additional guest suites each include marble bathrooms and walk-in closets. Outdoor living is exceptional, with a beautifully designed pool house featuring an open wood ceiling, wine refrigerator, and grilling area, all overlooking an elegant paver pool deck. The 1,100 sq ft air-conditioned three-car garage offers high ceilings ideal for car lifts, while the landscaped grounds and custom paver driveway enhance the home's grand presence. Engineered for long-term resilience, this elevated block construction features custom electric hurricane shutters, a whole-home Generac generator, and a new seawall (2023). The home further benefits from updated AC systems (all under warranty), a new pool and hot tub heater, tankless water heater, water softener, solar panels, LED lighting throughout, and numerous updated appliances. This exceptional residence combines pedigree, privacy, craftsmanship, and unmatched waterfront living. Secure your place in the winner's circle and experience one of Belleview Island's finest estates.