Decades ahead of its time, this Roaring 20s beauty with open flow main floor, gorgeous in-ground pool and English-style pub room was built for entertaining! Sunken living room w/fireplace, dining room, library, sunroom and foyer blend seamlessly for an open layout that has played to host to large cocktail parties and sit-down dinners for 40. The timeless white kitchen features exposed brick, marble counters, Viking stove & custom cabinetry. Kitchen and adjacent family room offer large French sliding doors that open onto an expansive 16x34 foot deck. Deck boasts views of the 20x40 foot in-ground gunite pool w/built-in hot tub nestled behind a majestic, ivy-covered "estate wall" that provides exceptional privacy. 2nd FL Bedrooms are very generously-sized w/charming period details (2 ensuite). 3rd FL offers 5th Bedroom (shown as office/music room) w/seasonal river views and a full hall BA. Many work from home options! Lower level (add'l 1500+sf) features a Pub Room w/an antique English bar, woodburning stone fireplace, pocket door and walkout to stone patio. Storage room (used as lounge/gaming room), laundry room, wine storage room & water closet (toilet) complete this level. Custom Marvin windows thru-out, new roof 2015, prof. landscape lighting in pool area, outdoor sprinkler/irrigation system & much more! A truly special, one-of-a-kind gem conveniently located between Ossining & Briarcliff Villages w/train, restaurants, shopping, waterfront & parks just minutes away.