Pre Construction. To be built. Positioned directly across from the iconic St. Regis Longboat Key Resort, this exceptional waterfront residence offers immediate access to world class amenities, pristine Gulf beaches, fine dining, and championship golf. Located within the exclusive double gated Harbor Section of Bay Isles on Longboat Key, 1600 Harbor Sound Drive represents a rare convergence of scale, location, and boating capability, crafted for those seeking a refined Gulf Coast lifestyle at the highest level. Set on an expansive 18,043 square foot corner homesite, the property features an impressive 135 feet of deep water canal frontage, with the ability to accommodate multiple lifts (up to three) and a substantial vessel. This level of frontage and flexibility is increasingly rare, even among premier waterfront estates. Spanning 5,689 square feet under air, the residence is thoughtfully designed to balance grand scale entertaining with comfortable everyday living. The home includes 5 bedrooms, a bonus room or office, 5.5 bathrooms, and a 4 car garage. Soaring ceilings and expansive glass openings create a bright, open environment with seamless indoor outdoor transitions, complemented by refined, designer level finishes and a private elevator servicing all levels. The chefs kitchen is executed with top tier appliances, clean architectural lines, and a level of detail rarely seen in spec construction. A full scale butlers pantry, complete with its own stove, provides exceptional functionality and allows for seamless entertaining while keeping the main kitchen pristine. The primary suite is designed as a true retreat, featuring separate his and her bathrooms and a fully integrated wellness experience, including a sauna and steam room, bringing a spa level environment into daily living. Every element has been carefully curated to deliver comfort, functionality, and a sense of understated luxury throughout. Outdoor living is equally compelling, with a resort style pool and spa, along with a fully equipped outdoor kitchen, covered dining, and lounge areas. These spaces are perfectly positioned to capture the tranquility of the waterfront setting while embracing Floridas year round coastal climate. Opportunities of this caliber, combining substantial frontage, strong boating capability, a wellness driven design, and a premier Harbor Section address are increasingly limited. 1600 Harbor Sound Drive presents a compelling offering for the discerning buyer seeking a newly built waterfront estate in one of Sarasotas most prestigious enclaves.