This exceptional custom designed 7 Bedroom Estate home is situated in the esteemed Jennings Beach neighborhood. Rarely offered for a Cold Spring Harbor address, with Lloyd Harbor Village included this refined living space encompasses a sprawling 3.78-acres. A dramatic two-story entry foyer greets you which opens to an expansive living area open to the breakfast dining and sophisticated bar area with a dual fireplace and high ceilings, creating the ultimate in cubic space. Enjoy culinary excellence in the designer gourmet kitchen featuring 4 pullout Sub-Zero refrigerators, a Sub-Zero wine refrigerator, and a Lacanche stove. The main floor showcases a private study and primary suite complete with a gas fireplace, two large walk-in closets, and a spa-like bathroom, steam shower, and separate water closet. The primary suite offers high ceilings and its own entrance to the serene back covered patio. Indulge in a private tennis court with a newly paved surface, a heated gunite pool with an integrated spa, and a chic pool house with its own bathroom, and a warm kindling outdoor fireplace. The expansive grounds are meticulously manicured yet offering a feeling of natural surroundings. The finished basement is a haven for recreation, boasting a movie theatre, gym, a playful playroom, and a guest suite with a separate entrance. Additional features include Carisle wide plank wood floors, Marvin windows, and an Elan home control system with 18 audio zones. The dual Buderus boiler system and 18 radiant heating zones ensure year-round comfort. This estate is equipped with advanced systems including a full-house generator, Hikvision camera security, Ecostar synthetic roof slates with a 50-year warranty, and Pulse Worx lighting. The 5-car garage-2 attached and 3 detached-includes a storage area above along with a new asphalt oil stone driveway curbed with oversized Belgium blocks. Enjoy direct access to pristine beaches at Cold Spring Harbor and the Incorporated Village of Lloyd Harbor. This residence is the pinnacle of luxurious living and is ready to offer you an unmatched lifestyle of sophistication and relaxation. Experience the ultimate blend of privacy, luxury, and convenience in this exceptional Estate home. Cold Spring Harbor SD#2. Jennings Beach with invitation.