A one-of-a-kind estate residence nestled in the desired Glen Williams community of Halton Hills offering 4,003 total sqft above grade plus 2,161 total sqft below grade, providing over 6,000 total sqft with complete privacy & exceptional versatility. Set on a premium 79 x 119 ft lot backing onto lush greenery, this home features a 3-car garage, fully walkout basement & private self-contained in-law suite with its own entrance, kitchen, laundry, bedroom & full bathroom. With 4 spacious bedrooms above grade & 5 bathrooms including 2 ensuites, Jack & Jill bath, main floor powder room & basement bath, this home is ideal for growing families & multi-generational living. From the exposed aggregate walkway & oversized covered front porch to the custom solid mahogany front doors, the home makes an immediate impression. Inside, you're welcomed by a stunning 17ft open-to-above foyer, elegant archways, real stone feature walls, beautiful staircase centrepiece & second-floor overlook. The main floor offers a private office with custom built-ins, formal dining room with tray ceilings, front sitting room with 17ft vaulted ceilings, oversized windows & a warm elevated feel throughout. The kitchen features extensive counter space, pass-through servery, spacious eat-in area & walkout to an oversized deck with gas hookup & stairs to the private backyard oasis. The family room offers a reclaimed barnwood feature wall, gas fireplace & peaceful views of mature trees. The main floor also includes custom-organized storage, laundry room & stunning powder room. Upstairs offers 4 generous bedrooms ideal for a growing family including a luxurious primary retreat with walk-in closet & spa-inspired ensuite. The walkout basement features a bright in-law suite, custom home gym with sauna, oversized cantina & additional storage. The backyard includes a concrete patio, hot tub, shed & private sports court. Steps to trails, Glen Williams, Copper Kettle Pub & The Glen Tavern. Book a private viewing!