Experience ultimate luxury and bespoke design at 3 Mary Willson Crt, a truly one-of-a-kind custom estate located on a private and quiet cul-de-sac, offering Over 6,000 sq. ft. of above-grade living space (excluding garage) with over $450,000 invested in premium upgrades.This exceptional residence features 7 spacious bedrooms and 9 bathrooms, with every bedroom offering a private ensuite and custom walk-in closet, delivering outstanding comfort and privacy. Hardwood flooring throughout both levels creates a fully carpet-free, refined interior, complemented by extensive recessed spot lighting throughout all rooms, bedrooms, and bathrooms, enhancing the bright and elegant ambiance. A grand open-concept foyer welcomes you into a thoughtfully designed layout ideal for family living and entertaining, highlighted by dual staircases, a super-sized private office, and a front walk-in coat closet with a window. The chef's dream kitchen serves as the heart of the home, featuring floor-to-ceiling custom cabinetry with decorative moulding, a stainless steel gas range, a large pantry, and an oversized open-concept layout perfect for everyday living and hosting.Designed for multi-generational living, the rare oversized main-floor bedroom includes its own private laundry and ensuite, while the upgraded second-floor laundry with window adds convenience. Ceiling heights impress with 10 ft on the main floor and 9 ft on the second floor, enhanced by a dramatic skylight.Enjoy a south-facing, resort-style backyard with a custom inground pool, premium interlocking, vinyl fencing, and a whirlpool jacuzzi, offering the perfect retreat for relaxation or entertaining. Completing this offering are a 4-car garage, total parking for 10 vehicles, and two independent furnace and air conditioning systems for year-round comfort.A rare luxury estate, extensively upgraded, generously scaled, and privately situated-an exceptional opportunity in one of East Gwillimbury's most prestigious locations.