Nestled at the end of a tranquil cul-de-sac, 9 Hidden Green Lane is a turnkey Mid-Century Modern gem that masterfully blends iconic design with modern comforts. Privately sited on a lush 0.78-acre lot and bordering the scenic Leatherstocking Trail, this 5-bedroom, 4.5-bathroom home spans 3,775 square feet and offers the ultimate indoor-outdoor lifestyle. Originally built in 1962, the residence showcases timeless architectural elements including vaulted wood ceilings, skylights, and expansive walls of glass that frame sweeping treetop views. The open floor plan is highlighted by a dramatic living room with fireplace and direct access to wraparound decks, a formal dining area, and a striking eat-in kitchen with custom cabinetry, stainless steel and butcher block countertops, and open shelving. The serene primary suite features a spa-like bathroom, generous closet space, and an adjacent bedroom or office—ideal for remote work or a nursery. The expansive lower level offers radiant heated floors, a spacious family room with fireplace and sliding doors to a lower deck, two en-suite bedrooms, a third additional bedroom, full bath, sauna, and ample storage space. Designed for both relaxation and entertaining, the home's outdoor amenities include a saltwater in-ground pool, bluestone patio, organic garden, and seamless access to nature. Energy-efficient upgrades, such as owned solar panels, complement modern systems including central air conditioning, EV charging, natural gas heating, and an attached two-car garage. Located in the sought-after Mamaroneck School District and zoned for Murray Avenue School, this architecturally significant home offers a rare opportunity to live in harmony with nature—just minutes from town, train, and all village amenities.