A newly built custom estate, offered below replacement cost. The main and upper levels are complete and move-in ready. The final vision of lower level, driveway and backyard, is yours to shape. The combined cost of land, construction, design, permits, and carrying time for an estate of this calibre on this lot exceeds the asking price. This is the arithmetic, not a projection. 41 Thornbank Rd. is an architectural gem on one of Thornhill's most coveted streets in Vaughan's most exclusive enclave. Set on a rare 100 x 302 ft lot backing onto The Thornhill Club Golf Course, this Raphael Gomes-designed estate delivers scale, privacy, and architectural presence. Approx. 16,200 sq.ft total, with 10,771 sq.ft above grade. The exterior features beautiful Limestone and Belden Winter Mist brick complemented with North Country black slate roof for longevity. 3-car Garage with 20+ ft. ceiling height. The main floor features 12-ft ceilings, a 28-ft cathedral foyer and family room, two-storey glass wall, Miele gourmet kitchen with prep kitchen, oversized island, wine fridges, 2 powder rooms, and a grand office with separate entrances. 10-ft solid-core doors throughout. 11 bathrooms total (3 roughed-in lower level, 1 outdoor cabana). The upper level offers 10-ft ceilings, 5 luxury bedrooms each with ensuites and walk-ins, including a primary suite with 500 sq.ft custom closet, 400 sq.ft 7-pc spa ensuite, fireplace, and private terrace. Upper level laundry as well. Smart home throughout: Control4 automation, Central vac, Lutron automated blinds, 400-amp service, heated floors, private elevator serving all 3 levels. The lower level is structurally complete with 5400+ sq.ft, framed, drywalled, with electrical, plumbing, and HVAC installed. Roughed-in for theatre, spa, gym, rec room, and 2 bedrooms. Permits remain open. Landscaping, driveway, and pool site are permit-ready. Contractor quotes available for landscaping, pool, and basement completion for approx. $1M