26 Autumn Circle presents a rare opportunity to own one of Halton Hills' most significant custom estates. Situated on approx 5.85 acres within a prestigious estate community and backing onto mature greenery, this David Smalls masterpiece was conceived as a true white-sheet custom build with hundreds of hours dedicated to its design and execution. Offering 6,321sqft above grade plus an additional 3,988sqft below grade, this remarkable residence features 4+1 beds, 7 baths, an attached 3-car garage, detached 3-car garage and auxiliary barn. A dramatic 20ft open-to-above foyer creates an unforgettable first impression, while reclaimed barnwood flooring extends throughout all 3 levels. The spectacular family rm features 20ft ceilings and oversized windows that flood the home with natural light and connect to the stunning Pearl Custom Kitchen complete with oversized island and butler's pantry. Extensive plaster crown moulding, recessed ceilings, custom millwork and 10in baseboards elevate every space. The main flr primary retreat offers dual entrances, private balcony, his & hers W/I closets and a spa-inspired ensuite. The upper level features 3 spacious bedrms, including 1 with a private ensuite and 2 connected by a Jack & Jill bath, all positioned at the rear of the home with views of the property. The finished lower level features heated reclaimed barnwood floors, oversized excavated windows framed by armour stone, rec rm, wet bar, 5th bedrm with private ensuite, in-law suite potential and an approx 1,000sqft commercial-grade gym recessed 1ft to achieve nearly 10ft ceiling clearance. A Control4 smart home system provides automation throughout. Outdoors, resort-style living awaits with extensive hardscaping, inground pool, putting green, bocce court, covered rear porch with overhead heaters, heated patio and entertaining areas. A property of this calibre is rarely offered; the craftsmanship, quality and attention to detail must be experienced firsthand.