A rare estate package opportunity in the gated community of Stirrup Key, this four story Luxury Custom residence is offered with a separate vacant lot with its own Parcel ID, a transferable building right, and a deeded boat slip in the community marina. Together, these features provide flexibility for future expansion, an additional residence, or long term value in one of Marathon's most established neighborhoods. The home offers elevated water views, water access, and a layout designed for both everyday living and entertaining. The ground level features a three car garage, generous storage, and direct access to the pool, creating easy indoor outdoor living. The second floor serves as the main living level with two bedrooms, two full baths, a full kitchen, and open living and dining areas that extend onto a large screened lanai, ideal for relaxed gatherings and evening breezes. The third floor offers a private primary suite, sitting area or fourth bedroom, with bar/kitchenette and fireplace. Primary suite bath offers spa style features, and an expansive lanai with elevated views. A spiral staircase leads to the fourth floor widow's walk, finished with travertine flooring and a water hookup. From here, panoramic views stretch across Marathon and toward the Gulf, offering a peaceful setting for sunrise and sunset. A private nature path winds through preserved surroundings and leads to a Gulf front observation dock, ideal for wildlife viewing and enjoying the natural setting. Additional features include a lift to the second floor for added convenience. Located behind the airport with easy access to shopping, dining, and daily necessities, this property offers a rare combination of space, privacy, boating access via a deeded marina slip, and future development potential in the Florida Keys. Schedule a private showing to experience the space, views,& the value of the additional lot, transferable building right, and deeded marina slip in person. B&BATVAI