Commanding a premier bayfront setting within Harbor Island, one of Newport Harbor's most coveted waterfront communities, this exceptional residence offers an extraordinary blend of contemporary architecture, refined designer finishes, and effortless indoor-outdoor living. Boasting approximately 53 feet of water frontage and a private 40-foot dock accommodating up to a 55-foot vessel and three vessels total, the property captures the very best of Newport Beach waterfront living. Spanning approximately 4,440 square feet, the residence features four en-suite bedrooms, four-and-one-half bathrooms, and a thoughtfully designed floorplan for both grand entertaining and everyday living. A dramatic double-height entry introduces the home's sophisticated aesthetic, highlighted by a floating staircase with stainless-steel railings, expansive walls of glass, wide-plank wood flooring, and a Tom Dixon statement chandelier. The main living areas are oriented toward the water, creating a seamless connection to the bayfront terrace beyond. Designed for entertaining, the outdoor living space features an in-ground spa, outdoor fireplace, and areas for dining and lounging while overlooking the harbor and passing yachts. The gourmet kitchen serves as the heart of the home, appointed with waterfall-edge onyx countertops, custom cabinetry, Wolf appliances, a built-in Sub-Zero refrigerator, Sub-Zero wine refrigeration, a wet bar, and island seating. Adjacent dining and living spaces open directly to the waterfront and are complemented by a custom Bocci chandelier featuring hand-blown glass. A desirable main-level en-suite bedroom provides flexibility for guests or multigenerational living. Upstairs, the primary suite enjoys harbor views, a private waterfront balcony, wardrobe storage, and a spa-inspired bath with a freestanding soaking tub, walk-in shower, and designer Foscarini lighting. Two additional en-suite bedrooms, a secondary laundry area, and a spacious bonus room with a fireplace and wet bar complete the upper level. Additional amenities include custom built-ins, skylights, Restoration Hardware lighting, specialty tile from Artistic Tile and Tilebar, a Murphy bed, solar-assisted climate control, security and video surveillance, and an attached three-car garage. Residents enjoy close proximity to Balboa Island, Balboa Yacht Club, Newport Beach Yacht Club, Lido Marina Village, Fashion Island, award-winning schools, championship golf, and Newport Beach's coastline.