Welcome to thirty-five Chicken Valley Road, an extraordinary, gated estate set far off the road and approached by an approximately eight hundred twenty-five-foot private driveway entrance, culminating in a prestigious circular drive that announces arrival with quiet grandeur. Nestled within the coveted enclave of Old Brookville, this Brick Center Hall Colonial-masterfully built by the renowned Worrell Group-rests on four and one-half acres of impeccably manicured, estate-quality grounds and offers nearly ten thousand square feet of finished living space across all levels. The circular drive leads to a stately entryway accented by a stunning fountain, anchoring the home's grand approach. Step inside to a breathtaking twenty-two-foot entry foyer with soaring ceilings, intricate moldings, and refined wainscot paneling framing the sweeping staircase. The double-height foyer introduces elegant formal spaces, including a living room with a wood-burning fireplace featuring an ornamental mantel, marble inlay, and classic dental molding. Double columns guide you into the sophisticated sitting room, where French doors open to the terrace, creating effortless indoor-outdoor flow. The formal dining room is designed for grand entertaining, showcasing wainscot paneling, a decorative ceiling medallion, egg-and-dart crown molding, and exquisite millwork throughout. The renovated gourmet eat-in kitchen features top-of-the-line appliances, custom cabinetry, a large center island, and direct access to multiple outdoor dining terraces. Adjacent formal rooms-also with French doors-further connect the interior to the resort-like grounds beyond. The luxurious primary suite is a true sanctuary, offering twenty-two-foot tray ceilings, hardwood floors, serene estate views; a private sitting room with fireplace; a custom dressing room; and a spa-inspired bath with soaking tub and double vanities. Four additional en-suite bedrooms provide exceptional comfort and privacy; ideal for multigenerational living or long-term guests. The expansive lower level elevates entertainment and wellness with a billiards lounge; wet bar; sound-proof private screening room; three thousand one hundred-bottle wine cellar; gym; sauna; and full bath. Outdoors, the breathtaking grounds include a heated gunite saltwater pool; regulation tennis court; outdoor kitchen; sweeping lawns; and multiple blue stone terraces-offering both privacy and scale rarely found. Additional features include a three-car garage and a Generac whole-house backup generator. Ideally located in Old Brookville close to universities country clubs golf marinas museums farmsand premier North Shore amenities situated within the award-winning North Shore School District.