Magnificent custom-built residence on a premium west-facing ravine lot in the prestigious Mackenzie Ridge - Ambassador Hills Estates enclave, offering over 6,000 sq ft of total finished living space across three levels plus a fully appointed cabana. This 5+2 bedroom, 7-bathroom estate features soaring 12' ceilings on the main floor, a grand two-storey foyer with curved oak staircase, and walls of arched windows framing ravine and sunset views. The chef's kitchen is outfitted with an oversized centre island, premium built-in appliances, double wall ovens, full-height marble backsplash, and a dedicated coffee bar, flowing seamlessly into a sun-filled great room and walkout deck. The main floor also includes a dedicated home office, formal dining, secondary office or a bedroom, and access to a 3-car garage. Upstairs, the primary suite offers a sitting area, gas fireplace, walk-in closet, and 6-piece ensuite, complemented by additional generously sized bedrooms. The fully finished walkout lower level features a self-contained 2-bedroom, 1-bath apartment with full kitchen and private entrance, ideal for in-laws or income, plus a dedicated home gym and bonus office space. Resort level grounds include a heated inground pool (new heater 2024), expansive stone patio, sport court, and a 450 sq ft cabana with a kitchen and gas fireplace. Recent upgrades include two furnaces (2023), two A/C units (2023), and pool heater (2024). Close to top-ranked private and public schools, Maple Downs and Eagles Nest Golf Clubs, Highway 400, and the Oak Ridges Moraine trails. A rare opportunity to own one of the area's finest estates.