Welcome to 133 Cook's Mill Crescent a rare opportunity to own a home on one of the most coveted and family-friendly streets in the Valleys of Thornhill. This impressive 4,457 sq ft residence (above grade) is perfectly positioned on a premium 60 x 126 ft pool-sized ravine lot, backing onto a serene wooded greenbelt for maximum privacy and a daily dose of nature. From the moment you step inside, you'll notice the soaring 9' ceilings that elevate every level of the home including the basement creating a sense of grandeur and openness throughout. Designed for both everyday living and elegant entertaining, the main floor boasts a flowing layout framed by arched entryways, columned transitions, and oversized windows that drench the space in natural light. The great room is just that - GREAT with double-height ceilings, a fireplace flanked by custom built-ins, and a striking wall of south facing windows overlooking the wooded ravine. A formal dining room with a stunning oval coffered ceiling, a chefs kitchen with centre island and abundant cabinetry, and multiple living zones make this home the heartbeat of family gatherings. Upstairs, you'll find four generously sized bedrooms, each with access to an ensuite. The primary suite features an extra-large walk-in closet, a spa-like ensuite, and peaceful treetop views. Additional highlights include: a professionally installed stair lift, dark-stained exotic hardwood floors throughout, and a 3-car garage with EV charging and ample driveway parking. If you've been waiting for a home thats not just big, but beautifully built for family living this is it!