An exceptional custom residence set on a commanding 150 x 75 ft lot in one of Southwest Oakville's most established and coveted neighbourhoods.Boasting over 6,300 square feet of total living space, this home offers 5 bedrooms and 6 bathrooms across three beautifully finished levels. This home showcases a rare and highly desirable layout with two primary suites - one on the main floor and a second grand retreat upstairs. Designed for elevated living and effortless entertaining, the home features refined principal rooms including formal living and dining areas, a private office, two powder rooms, and a full laundry suite. At its heart, the chef's kitchen impresses with rich cabinetry, granite countertops, marble flooring, a large centre island with seating, built-in stainless steel double wall ovens, gas cooktop, beverage fridge, and seamless flow into the family room with gas fireplace and custom built-ins. The main-floor primary suite offers privacy, an ensuite bath, and walk-in closet - ideal for multigenerational living or main-level convenience. Upstairs, the second primary retreat feels like a private sanctuary with its own fireplace, spa-inspired ensuite, and generous dressing space. Two additional bedrooms share a spacious 5-piece Jack & Jill bath, creating a functional family wing. The fully finished lower level enhances the lifestyle appeal with a large recreation lounge, wet bar, gym area, fifth bedroom, and full bath - perfect for guests or extended family. Outdoors, a private backyard oasis framed by mature landscaping features an inground pool, pergola-covered lounge, multiple hardscape entertaining areas, and a detached shed. A double garage with upgraded tiled flooring and private driveway complete this distinguished offering. Five bedrooms. Two primary suites. Three finished levels. A rare estate-sized lot in Southwest Oakville. 390 Seaton Drive - a home of scale, versatility, and enduring elegance.