A Rare Once-in-a-Lifetime Masterpiece in Mississauga's Prestigious Rattray Park Estates. Nestled on a private, tree-lined nearly half-acre lot, this custom-built architectural gem boasts over 9700 square feet of finished living space. It masterfully combines artistic excellence, unparalleled craftsmanship and resort-style living in one of Mississauga's most coveted communities. This property's standout feature is its rare main floor two primary bedroom design - a layout rarely seen in luxury homes. Both suites are identical in size and finish, each with a spacious walk-in closet, sharing a luxurious bathroom and are linked by a private corridor, ideal for multi-generational living. Enter through solid oak doors into a dramatic 20 foot foyer featuring oversized Versace tiles, hand-laid inlays, antique mirror panels, and a sculptural chandelier. Versace tiles flow throughout, paired with fluted paneling, underlit stone accents, and 5 glowing fireplaces. Main floor offers grand living spaces bathed in light: living room with a book matched porcelain feature wall, an elegant dining room and a sun-drenched four-season sunroom with skylights. The chef's kitchen is highlighted by Maer Charme underlit semi-precious stone counters and backsplash, premium Miele appliances, the glowing island and breakfast area overlooking the backyard oasis. Upstairs: three additional bedrooms with walk-in closets and ensuites/semi-ensuites, a private office with custom wood paneling and built-ins with an elevator serving all levels. The lower level is built for entertaining: home gym with direct pool access, state-of-the-art theatre, sauna, showpiece wet bar with underlit stone and white oak feature wall, plus a full in-law suite with kitchen, living area, bedroom and 4 piece ensuite. Outside enjoy a private resort featuring a heated saltwater pool, cabana bar with grill and beverage centre, media wall, putting green, mature trees and heated driveway. Just steps from Lake Ontario, this is ultimate lakeside luxury living.