Experience coastal luxury in this 2025 marshfront estate in Windmill Harbour, Hilton Head Island. Set on nearly an acre with breathtaking water views from Jarvis Creek to Calibogue Sound, this meticulously renovated home epitomizes Lowcountry living. Wide-plank white oak flooring, bespoke cabinetry and a Carrara marble island anchor the gourmet kitchen, which boasts Wolf range, Sub-Zero refrigeration, paneled appliances, unlacquered brass fixtures and dual sinks. Two private offices, a spacious walk-in pantry, custom mudroom lockers and an elevator ensure modern convenience. The light-filled primary suite features a private sunroom overlooking the marsh.The elegant design blends Southern charm with contemporary lines, flowing from open living areas to outdoor terraces where you can watch herons and dolphins at sunrise and sunset. Spa-inspired bathrooms and well-appointed bedrooms offer comfort and privacy, while expertly landscaped grounds highlight the marsh's natural beauty. A rare feature of this Hilton Head real estate is access to Windmill Harbour's private 258-slip marina and its 75-foot by 19-foot lock-one of only three private locked harbours on the East Coast. This engineering marvel creates a secure, tide-free basin that insulates boats from tidal swings and rough weather, ensuring calm water at your dock and minimal barnacle growth, with 24/7 access via personal lock card.Optional membership in the South Carolina Yacht Club adds fine and casual dining, tennis, pickleball, fitness center, saunas, nature trails and deep-water dock privileges. Windmill Harbour is ideally located near Hilton Head's beaches, golf courses, shops and restaurants and offers easy access to Bluffton and Savannah. Gated security, community activities and proximity to the Intracoastal Waterway make it a sought-after destination for primary residences and vacation homes.If you seek a luxury marshfront home with deep-water access and a lock-controlled marina or simply want a serene waterfront retreat, this Windmill Harbour estate delivers. Its high-end finishes, modern conveniences and access to world-class boating amenities set it apart. Discover why homes for sale in Windmill Harbour are so coveted and schedule your private tour today.