Welcome to 18 Donna Mae Cres, an impressive custom-built residence offering approximately over 6,000 sq. ft. of total living space. Tucked away on one of Thornhill's most peaceful streets - an exclusive enclave of only 20 homes This well-kept home is surrounded by a tall, mature hedge, offering exceptional privacy and a peaceful, secluded setting. A grand double - height foyer welcomes you into beautifully proportioned principal rooms, featuring 10-ft ceilings on the main floor, 9-ft ceilings on the second floor and basement, elegant arched windows and crown moulding throughout. The main level offers living and dining rooms, a spacious family room with fireplace, private office, and a generous eat-in kitchen with walkout to the backyard. Upstairs, 5 spacious bedrooms provide plenty of room for the entire family, including an impressive primary retreat with a 6-piece ensuite and walk-in closet with skylights, plus additional ensuite baths. Newer bathrooms add a fresh, updated feel throughout. The newly renovated 9-ft basement featuring a large recreation room, wet bar, gym, sauna, 2 additional bedrooms and washrooms and oversized windows. An extra-wide driveway and the tandem 4-car garage are equipped with an EV charger and a practical slatwall storage system, complemented by an extra-wide driveway for ample parking. Offering impressive scale, custom-built character, exceptional privacy and tremendous potential, this is a rare opportunity in one of Thornhill's quietest and most private residential pockets.