Welcome to 1234 Shea Road #10 on beautiful and highly sought-after Three Mile Lake in the heart of Muskoka - a custom-built waterfront retreat being offered for sale for the very first time. Set on 103 feet of pristine frontage with sweeping sunset views, this exceptional four-season property offers the perfect blend of luxury, comfort, and classic Muskoka charm, with easy year-round access. Impeccably maintained and thoughtfully designed, the 3-bedroom, 2-bathroom cottage showcases quality craftsmanship throughout, with soaring windows, stunning lake views, and an open-concept layout ideal for entertaining and relaxed waterfront living. The beautifully appointed custom kitchen features granite countertops, custom cabinetry with built-in lighting, premium Bosch appliances, copper sinks, and an impressive oversized island that naturally brings family and friends together. A warm wood-burning fireplace anchors the main living space, while the expansive lake-facing deck creates the perfect setting for morning coffee, summer dinners, and sunset evenings overlooking the water. Upstairs, the loft-style primary retreat offers a peaceful escape complete with an ensuite bathroom and sitting area with elevated lake views. The lower level features a cozy family room with propane fireplace, walkout access to the lower deck, and flexibility for future customization. Outside, enjoy true Muskoka living with a private hot tub, deep water off the dock for swimming and diving, and a gradual shoreline entry for easy lake access for all ages .Additional features include central air, central vacuum, surround sound, a heated detached double garage with 60-amp service, plus a separate storage shed for all your cottage essentials. Whether you're searching for a family cottage, an entertainer's retreat, or a peaceful year-round home, this Three Mile Lake offering delivers an exceptional cottage experience in one of Muskoka's most desirable locations.