LONGHOUSE is an architecturally significant waterfront estate inspired by Rural Modern design, set on 6.85 acres with over 350 feet of private frontage on the Napanee River. Designed for multi generational living and exceptional entertaining, the property offers approximately 6,000 sq. ft. of finished living space, including a spectacular river-facing solarium, a double-car garage attached garage and a self-contained loft residence above. The timber-frame main residence sits atop a wood-textured concrete plinth, capturing panoramic river views from nearly every room. Outdoor living is highlighted by a 1,000sq. ft. riverfront terrace and professionally landscaped grounds that blend seamlessly with the surrounding natural environment, gated property access, 2-car garage attached, 2 car detached garage and fully paved driveway. Inside, thoughtfully curated finishes showcase exceptional craftsmanship, including rift-cut white oak millwork, hand-finished cabinetry, Italian porcelain tile, German-engineered white oak flooring, and a STUV wood-burning fireplace. Expansive windows flood the home with natural light while framing breathtaking water views. The main level features a luxurious primary suite with a spa-inspired ensuite, walk-in dressing room, and direct access to outdoor living spaces. The upper level offers two additional bedrooms, a shared bath, and a dramatic gallery/library space. The lower level includes a guest suite, family room, wellness area, laundry facilities, and flexible living spaces. Located between Kingston and Prince Edward County, LONGHOUSE provides a rare combination of privacy, architectural excellence, and year-round estate waterfront living. Approximately two hours from Toronto, Ottawa, and Montreal, this remarkable property represents a unique opportunity to own one of Eastern Ontario's premier luxury waterfront estates.