This 11,723 SF+/- masterpiece redefines harbor water front luxury living. A collaboration between Andre Kikoski, Sofia Joelsson, and Ed Hollander, this 4-level residence sits on 250' of direct frontage on Sag Harbor Cove, featuring a private beach and an exclusive deep-water marina with two 60' slips. The Residence is defined by floor-to-ceiling glass and seamless indoor/outdoor transitions, the home features 8 bedrooms, 9.5 bathrooms, and an elevator serving all levels. Living spaces are light-filled, open-concept layout with wide-plank flooring, a sculptural floating staircase, and double-height foyers. The chef's kitchen embraces only the best: White Calacatta marble, custom charcoal Ecolak cabinetry, and a suite of Miele, SubZero, and Gaggenau appliances. The primary suite is situated in its own private wing featuring dual walk-in closets, panoramic water views, and a spa-bath clad in fluted Fior De Bosco tile and Black Cosmic granite. The guest quarters are elegant designer en-suites appointed with Zebrino marble, Canaletto walnut, and molten brass accents. Additional amenities include a Rooftop Oasis with an expansive terrace and a full outdoor kitchen, BBQ, and dining all overlooking Sag Harbor Cove. Sunsets provide moving artwork throughout the seasons. A private gym with Technogym equipment, 4-car underground garage, and a Rolls-Royce-engineered backup power system. All of this mere steps from Sag Harbor's Main Street galleries and fine dining. This isn't just a home; it's a masterclass in Hamptons engineering. From the deep-water docking to the rooftop with pool potential, extraordinary sunsets, every inch has been intentionally curated for capacious hosting and tranquil privacy.