Welcome to Maison de Tranquillite'. Private gated entry leads to this amazing 7+acre compound, formerly part of the Pratt Estate, showcasing professionally landscaped grounds with lush plantings, one of a kind rock formations, pathways and steps that picturesquely guide you to the Gunite in ground pool w/spa, Tennis Court, Koi Ponds w/Waterfall, and enchanting Gardens. This exquisitely designed residence, with over 8800 Square feet of living space, provides a sense of luxury and sophistication throughout. As soon as you enter the grand two story formal entry, highlighted by the amazing sweeping staircase and beautifully detailed granite & stone inlay flooring you appreciate the impeccable craftmanship & attention to detail. From the high ceilings, all recently outfitted with extensive LED lighting, to the large arched windows, the spacious first floor is drenched in sunlight and features a formal living room & dining room, library/office with hand carved double doors & custom built ins, Chefs Center Island Kitchen with all high end appliances & large glass encircled breakfast area, great room with gas fireplace & french doors to the expansive raised patio area, two guest baths & rear staircase to all levels. Ascending to the second floor, hand carved double doors open to the primary suite with sitting room, dressing area, two walk in closets, full bath w/steam shower and access to a large terrace & balcony, ideal for morning coffee whilst overlooking the pool and bucolic grounds, four additional bedrooms with en-suite bathrooms & walk in closets and large multi purpose great room. The walk out lower level boasts a media/game room, wine cellar, dance studio, gym, full bath with steam room & sauna, & den area with direct access to the property, pool & tennis. Fully redone four car garage & long circular driveway enhance this homes appeal. Private beach & golf rights. Locust Valley School District. Close to the Village of Locust Valley with shops, restaurants & train station