Tucked away on 5 private acres towards the end of a quiet cul-de-sac, this exceptional Barrington Hills estate offers an extraordinary combination of architectural significance, equestrian amenities, and resort-style outdoor living. With approximately 7,000 square feet of finished living space, 5 bedrooms, 5 full baths, 2 half baths, a circular drive, and a 4+ car garage with tandem-depth bays, this is a truly rare offering. Famed Barrington architect Robert Parker Coffin reimagined the home's front elevation, introducing classic windows, additional natural light, and a striking main entrance framed by substantial cedar timbers and pillars, complemented by a leaded-glass front door and matching sidelights. Coffin also designed the impressive 36' x 48' cedar-sided barn and one-bedroom barn guest apartment, as well as a custom pool house with stone fireplace that was never built; the architectural plans are included with the sale. Inside, soaring vaulted ceilings enhance the foyer, living room, kitchen, primary suite, primary bath, and barn guest apartment. A stunning artisan-crafted marble foyer showcases a distinctive center medallion formed from four mirror-image marble tiles, setting the tone for the craftsmanship found throughout. Four wood-burning fireplaces add warmth and character, including three adorned with custom solid walnut mantels handcrafted from Illinois black walnut trees. The gourmet kitchen features top end appliances including 2 Viking ovens, Thermador 6 burner cooktop, separate SubZero refrigerator and freezer, new Bosch dishwasher, GE Advantium combination microwave and oven. Reclaimed longleaf heart pine flooring in the three-season room and random-width oak flooring in the library and primary suite further elevate the home's timeless appeal. The recently renovated primary bath offers a luxurious retreat with a custom tile shower, quartz countertops, new cabinetry, frameless glass enclosure, and a whirlpool soaking tub. The finished walkout lower level expands the home's versatility with a fireplace, kitchenette/wet bar, exercise room, two full baths, recreation areas, and a tandem bedroom with custom built-in hickory cabinetry including desk, bookcases, and dresser/storage cabinetry-ideal as a bedroom, guest suite, home office, or multigenerational living. Step outside to your own private resort. The 20' x 40' inground pool with automatic safety cover and adjoining spa that cascades into the pool are surrounded by natural granite boulders, an antique granite paver fire pit, and multiple gathering spaces designed for entertaining and relaxation. The setting is both private and picturesque, blending seamlessly into the surrounding landscape. Equestrian enthusiasts will appreciate the thoughtfully designed barn featuring three horse stalls with Dutch doors opening directly to the paddock. The attached guest apartment offers vaulted ceilings, refinished oak floors, central heating and air conditioning, and a spacious full bath with double vanity sink and a tub with a new glass side panel, providing ideal accommodations for guests, a caretaker, home office, or studio. Combining architectural pedigree, exceptional craftsmanship, equestrian facilities, flexible living spaces, and a spectacular outdoor environment, this remarkable Barrington Hills estate presents a rare opportunity to enjoy the very best of country living just minutes from town, train, award winning D220 schools, shopping, dining and amenities.