Welcome to this extraordinary transitional mansion located in the prestigious Upper Thornhill Estate, where elegance and luxury meet unparalleled craftmanship. Spanning over 7,500sq.ft. of impeccable living space, this stunning estate is situated on a 69' x 149' premium lot on a quiet cul-de-sac. Featuring 5+1 Bedrooms, 9 Bathrooms, 3-Car Garage with addt'l parking for 9 cars on the driveway, Grand Foyer with an open riser spiral staircase, showcasing exquisite decorative moulding and architectural details, Gourmet Kitchen equipped with 2 Sub-Zero fridges, 2 Wolf built-in ovens + warmer, Wolf Gas Range W/6 burners & griddle, 9ft island, ceiling-high cabinets, servery&pantry, Access to a massive 16'x32' terrace perfect for outdoor dining & overlooking the breathtaking backyard. Soaring 22' Coffered Ceilings i the family room, accented by a custom wood & quartz fireplace surround, creating an inviting space for gatherings. Private Primary Suite with a seating area, 2 walk-in closets, a luxurious 5-piece ensuite, & panoramic city views. 5 Addt'l Bedrooms each featuring ensuites and walk-in closets, offering privacy and comfort for family and guests. Finished Basement with a custom kitchen, huge pantry, rec room with bar & fireplace, full-size windows W/security film, & a walk-out to the stunning backyard oasis. Fully landscaped with Arbel pavers and a luxurious saltwater pool - the perfect setting for relaxation and entertaining, Full-Size Elevator providing seamless access to all levels, 10' Ceilings on the main floor and 9' ceilings on 2nd level & Basement. This one-of-a-kind estate combines timeless luxury, breathtaking design, and a prime location, making it the ultimate family home. The backyard oasis is truly a sanctuary, offering a private retreat with a sparkling saltwater pool and meticulously designed landscaping, ideal for outdoor living and entertaining. Don't miss your chance to own this grand masterpiece in one of Thornhill's most coveted neighbourhood.