A true architectural masterpiece on the St. Lawrence River, this 4+1 bedroom, 5 bath custom-built residence offers over 6,000 sq. ft. of refined living space where every detail reflects timeless design and craftsmanship. Panoramic, south-facing waterfront views fill the home with natural light, while multiple terraces and balconies invite you to enjoy the outdoors year-round. The professionally landscaped grounds are a showpiece - meticulously designed with stone walkways, tiered gardens, mature trees, and accent lighting that create a private, resort-like atmosphere for entertaining or relaxation. Inside, the open concept main level showcases soaring ceilings and a chef's kitchen featuring Viking, Wolf, Miele, and Fisher & Paykel appliances, flowing seamlessly to elegant living and dining areas anchored by three fireplaces (one wood-burning). An elevator offers easy access to all levels, including a luxurious primary suite with breathtaking river views, a private balcony, and a spa-inspired ensuite. The main level features a billiard room. The lower level features a soundproof music room or home theatre, and fitness area. Expansive terraces with power screens capture spectacular sunrises and sunsets over the river. Perfectly located just a short walk to Treasure Island Marina and The Cove restaurant, this extraordinary property blends architectural excellence with stunning and natural beauty - offering the ultimate waterfront lifestyle.