Harbor-side luxury meets timeless elegance at this stunning 4,884 sq. ft. Colonial in the prestigious Orienta neighborhood of Mamaroneck. Nestled on nearly an acre with beautifully landscaped grounds, this 2007-built home offers light-filled interiors, a seamless open floor plan, and exquisite finishes. The gourmet kitchen, with its marble island and top-tier appliances, flows effortlessly into a spacious family room with a cozy fireplace, perfect for gatherings with French doors opening to a large deck, expansive backyard, dock and beach, while formal living and dining rooms provide elegant spaces for entertaining. The serene primary suite is a sanctuary of its own, featuring soaring ceilings, a spa-like bath, and a custom walk-in closet. Additional bedrooms are thoughtfully designed, each with en-suite or Jack-and-Jill baths. Plus, a third floor unfinished attic, accessible via a staircase, presents exciting expansion opportunities. Beyond the home, the private dock invites endless adventures. Picture yourself setting off on a jet ski, enjoying a breezy afternoon picnic on the Sound, or cruising to a waterfront restaurant for dinner—all from your own backyard. With a whole-house generator, a three-car garage, and just 36 minutes to Grand Central, this exceptional home offers the perfect blend of everyday luxury and vacation-style living in the heart of Orienta.