Sullivan Island

A rare and extraordinary opportunity to own a piece of Muskoka history on the prestigious waters of Lake Joseph. Welcome to Sullivan Island—an exclusive retreat offering the ultimate in privacy, luxury, and timeless cottage charm. Nestled on a dramatic, rocky shoreline dotted with windswept pines, this iconic property boasts spectacular sunset views and a prime Lake Joe location.

The beautifully appointed 4-bedroom main cottage combines classic Muskoka style with relaxed sophistication. Expansive wrap-around porches provide the perfect setting to soak in panoramic lake views, while the warm interiors—anchored by a soaring great room and stone fireplace—create an inviting atmosphere for family and guests alike.

Just steps from the main cottage, a grandfathered 3-bedroom boathouse offers oversized living quarters—a rare and valuable feature no longer permitted today. With 2 covered slips, the boathouse easily accommodates your fleet, while offering unparalleled guest accommodations perched directly over the water.

Outdoor living is at the heart of this property, with a custom hot tub tucked into the landscape, a games room gazebo for year-round fun, and multiple sitting areas designed for lounging, entertaining, and sunset watching. The natural, rocky shoreline and majestic windswept pines complete the quintessential Muskoka setting.

With deep water off the dock, sun-drenched exposure, and incredible privacy, Sullivan Island is a generational opportunity to own one of Lake Joseph’s most iconic island compounds. Accessible only by boat—yet close to all the mainland amenities—this is Lake Joe at its absolute finest.