This beautifully updated and renovated mid-century contemporary home is set on a quiet street and on over an acre of private property, with a choice of either Byram Hills (Armonk) or Chappaqua schools. Move-in ready, energy-efficient, and meticulously renovated and maintained, 153 Deerfield Lane North is a true gem. This sun-filled home offers over 3,500 sq. ft. of living space, including four bedrooms, a bonus room, and an additional finished lower level with a separate entrance, 2 car attached garage. The main level features a dramatic vaulted-ceiling living room with a fireplace, an open dining area leading to a wrap-around porch, and a modern kitchen with stainless steel appliances, walk-in pantry, and custom cabinetry. The oversized primary suite includes a luxurious en-suite bath with radiant heat and a cedar walk-in closet. Two additional bedrooms and a hall bath with radiant heat complete the main level. A separate bonus room with its own entrance is perfect for a home office, guest suite, or au pair. The walk-out finished lower level (1,102 sq. ft., included in total sq. footage) offers a large open area ideal for a family room, recreation space, plus a bedroom and a full bathroom, well suited for multi-generational living or a private workspace. Every detail has been thoughtfully updated for comfort, efficiency, and modern living: new roof, Andersen 400 Series windows, Fujitsu Airstage ductless air-conditioning and heat pump system, custom kitchen with stainless steel appliances, and bathrooms finished with upcycled natural stone and Kohler/Toto fixtures. Smart home systems include EERO Wi-Fi, Wyze cameras, automated lighting, and energy monitoring, smart-zoned comfort throughout. Additional highlights include a two-car garage with EV charging ports, cedar closets, a whirlpool tub, European-style radiators, and more. Set on two tax lots totaling 1.1 acres, this home offers privacy and convenience, close to train, schools, and Chappaqua town amenities. Buyers have a choice between Byram Hills and Chappaqua schools. Current taxes correspond to the Chappaqua school district and do not include STAR savings. Buyers should verify all information with the Town of Mount Pleasant. Possible pool site. Request a list of updates and special features.