Welcome to this one-of-a-kind architectural gem that blends artful design into a tranquil park-like setting. Enjoy the serene, tree-lined walk-up to the distinctive European-style front door. The show-stopping spaces, oversized windows, and dramatic 18" glass wall of accordion doors deftly blur the line between indoor and outdoor living, funneling a steady stream of natural light throughout the seasons and keeping the textured garden and its specimen plantings always in view. Every design detail quietly but qualitatively enhances daily life: a central cathedral ceiling creates a luminous, luxurious welcome; floor-to-ceiling windows intensify the proximity to nature; the glow of the raised fireplace creates a cozy ambience from the living room to the dining room; the kitchen is a versatile, highly equipped theater worthy of a Chef and is also capable of hosting calm intimate meals and casual fun; the family room lends itself to an elegant, unstuffy formality or to a low-key relaxed space to unwind. The staircase features concealed LED lights for a beautiful glow at night, leading to the private quarters designed around a sun-filled atrium. Rest and relaxation are assured in the main bedroom framed by panoramic windows; its exquisite en-suite bathroom holds a soaking tub, an oversized rain shower, a versatile Grohe Freehander shower system, and a double vanity. Three other bedrooms offer sleeping or working spaces with dreamy views of the tree canopies. A fabulous lower-level recreation room can be transformed into a state-of-the-art playroom or curated to suit more professional pursuits. The spacious 2-car garage is full of storage possibilities. Every modern convenience has been considered in this uniquely styled and tranquil retreat within walking distance from Hartsdale's vibrant downtown/ Metro-North train station and from the top-rated Edgemont Jr./Sr. High School. 163 Old Colony is truly a rare opportunity for that discerning client looking to be inspired each day by this bespoke, contemporary masterpiece.