Welcome to one of Stonehaven's most distinguished executive residences, perfectly positioned on a private, premium WEST-facing lot in one of Newmarket's most prestigious communities. Offering over 4,200 sq. ft. above grade plus a beautifully finished lower level with a separate entrance, this exceptional home was designed for luxurious family living, elegant entertaining, and multigenerational flexibility. From the moment you enter, you're welcomed by soaring spaces, custom millwork, rich wide-plank hardwood flooring, striking stone accents, and an abundance of natural light throughout. The thoughtfully designed layout features expansive principal rooms, a private executive office with fireplace, and seamless flow ideal for hosting large family gatherings and celebrations. The chef-inspired kitchen overlooks the backyard retreat and opens effortlessly to generous family living spaces, creating the perfect setting for everyday living and memorable entertaining. Upstairs, the luxurious primary suite offers a true private retreat with a spa-inspired ensuite, freestanding soaker tub, oversized glass shower, and spacious walk-in closet. Three additional oversized bedrooms provide exceptional comfort for family and guests. The fully finished lower level is a standout feature, offering a private self-contained suite complete with its own kitchen, laundry, multiple bedrooms, and spacious living area-ideal for extended family, live-in parents, adult children, guests, or private accommodations. Step outside to your own resort-inspired backyard featuring extensive decking, mature landscaping, hot tub, fire pit, and exceptional privacy with western exposure-an extraordinary outdoor space designed for relaxation and entertaining.