Welcome to an extraordinary Georgian Bay retreat on coveted Markham Island, offering ownership of approximately half of a private 7-acre island, with the balance protected as Crown Land. Accessible via a scenic 20-minute boat ride through the sheltered South Channel, this exceptional property enjoys unparalleled privacy within the renowned Massasauga Provincial Park region, where future development is highly restricted.The distinctive octagonal cottage features an open-concept design, a custom granite kitchen, and expansive wraparound decking that captures sun and views throughout the day. With 3 bedrooms + loft and 4 full bathrooms, including 3 ensuites, there is ample space for family and guests. Multiple walkouts seamlessly connect the interior living spaces to the surrounding decks, waterfront and boathouse. Since 2018, over $900,000 has been invested in extensive renovations and infrastructure improvements, including a new septic system, updated kitchen, remodeled fireplace, new windows and doors, new roofing, Maibec siding, upgraded electrical service, new heating systems, and over 2,000 sq. ft. of new decking. Additional features include a renovated guest cottage with full bath, an extremely rare double-slip floating boathouse, expansive docks with new decking and refinished custom ramps and walkways. Included in the sale is a dependable Crestliner utility boat, an invaluable asset for island living. A rare turnkey island estate offering exceptional privacy, extensive upgrades and the very best of the Georgian Bay lifestyle. Some images are digitally staged.