Rarely Offered Modern Custom-Built Architectural Masterpiece in Prestigious Unionville! Featuring a refined natural limestone and brick exterior, a grand solid mahogany front door, and a rare heated driveway for winter convenience. An impressive foyer opens to a spectacular open-to-above Central Hall with a sky-high skylight, wrought-iron staircase, and floor-to-ceiling porcelain slab feature walls. A private main-floor office offers built-in bookcase and a large window overlooking the front yard. Elegant living and dining rooms are defined by coffered ceilings, crown mouldings, and ambient LED lighting, with built-in speakers on the main floor. Two gas fireplaces enhance the living and family rooms. The gourmet chef's kitchen is appointed with quartz countertops, a natural stone waterfall island, and high-end appliances, seamlessly connecting to the breakfast area and family room with walk-out access to a fully fenced backyard, stone patio, and automated sprinkler system. The upper level offers four spacious bedrooms, each with a private ensuite. The primary retreat features a vaulted ceiling, private balcony, custom walk-in closet with centre island, and a spa-inspired 7-piece ensuite with steam sauna. Radiant heated floors are installed in all upper-level bathrooms. The professionally finished walk-up basement features radiant heated floors throughout, including a recreation room with porcelain slab flooring, complemented by an exercise room, an additional bedroom with a private ensuite, and a dedicated home theatre with laser projector and built-in sound system. Additional features include a Lennox furnace and air conditioning system, HRV system, video doorbell, and security cameras. Conveniently located steps to Historic Main Street Unionville, Toogood Pond, parks, shopping, and top-ranked schools including Unionville High School.