Gulf-to-Bay estate on Casey Key offering rare, deeded private beach access a few steps from the front door and deep-water frontage on Blackburn Bay. Set on more than a half-acre, this elevated coastal residence spans more than 5,500 square feet and delivers a true dual-waterfront lifestyle with boating on one side and the Gulf of Mexico on the other. The bayfront setting is designed for outdoor living and entertaining, featuring a multi-level tropical environment with expansive pavered decks, covered lounge areas, a gazebo dining space with fully equipped summer kitchen and built-in grilling station, and an open pool terrace with heated swimming pool and spa (resurfaced with a PebbleTec finish). A second-level screened bayfront patio provides a tranquil vantage point overlooking the water. The extended dock, updated in 2018, includes a lift and offers deep-water access with no fixed bridges--ideal for sailboat or powerboat use and direct passage to the bay and Gulf. Inside, cathedral ceilings and walls of oversized impact windows and sliders frame sweeping views of the bay while filling the home with natural light. The layout is well suited for guests and multi-generational living. The first floor includes a family room, game room, two guest bedroom suites, office with built-ins (that can also be used as a fourth bedroom), and a convenient kitchenette. The second floor is dedicated to the main living spaces, featuring a bay-view living room, dining room, granite kitchen with island and informal dining area, stainless steel appliances, wet bar with wine cooler, and the primary bedroom suite with en-suite bath. A three-stop elevator and stair access connect all levels. Significant updates include a metal roof replacement (2022), multiple A/C changeouts (2017-2024), replacement of non-impact windows with Anderson impact windows, updated dock pilings and lift pilings, new ductwork, electrical upgrades, and re-piping--providing long-term confidence for coastal ownership. Located on the quiet southern end of Casey Key, this estate offers a private island setting while remaining close to everyday conveniences. Enjoy easy access to Nokomis Beach, Venice Island dining and shopping, marinas, and the Legacy Trail. Downtown Sarasota's cultural venues, golf courses, and waterfront attractions are within a short drive, making this a distinctive opportunity to enjoy Gulf beaches, boating, and refined coastal living in one of Sarasota County's most exclusive barrier-island communities.