One-in-a-million custom-built home with a legal accessory apartment, perfectly suited for extended family, guests, or additional income! Privately situated backing acres of the former Old Girl Scout Property, this exceptional home offers a rare combination of privacy, space, quality construction, and amenities. The main home features a first-floor bedroom and full bath, beautiful hardwood floors, cedar-lined closets, a stunning stone fireplace, and a 3-year-old wood-burning stove. Anderson Windows, 5 zone burner, new hot water heater, cac plus 2 mini splits, and a mini split in the garage as well, Lower level apartment also has a fresh air system, The spacious kitchen includes a new refrigerator, while the large mahogany deck overlooks the fully fenced, incredibly private backyard and gorgeous 16' x 32' freeform Gunite pool, recently finished with new marble dust. An outdoor shower adds to the summer enjoyment. Upstairs, you'll find a cozy primary bedroom ensuite with a full bath featuring radiant-heated floors, plus a unique catwalk leading to two additional bedrooms and another full bath. The home is built with quality 2x6 construction and offers copper gutters, a lifetime transferable roof, whole-house water filtration system, and a freshly painted interior. The oversized brand-new driveway provides plenty of parking. The garage is heated and air-conditioned and includes an additional washer/dryer hookup. A backup propane automatic generator provides added peace of mind. The property also has five cesspools, including three brand new systems. And then there's the location-tucked away in an exceptionally private setting, with a bonus having McNulty's right at the end of the block! All this in the desirable Miller Place School District. A truly special property that offers privacy, flexibility, and amenities rarely found in one home!