Welcome to Lion's Gate on the Sound, a majestic and impeccably upgraded waterfront estate set on over 3 private, gated acres along the coveted shoreline of the Long Island Sound in Mattituck. This move-in-ready sanctuary seamlessly blends timeless architectural charm with modern luxury, offering a rare opportunity to own one of the North Fork's most distinguished coastal properties. From the moment you arrive, a newly resurfaced driveway winds through electronic gates and a fully updated fencing system, unveiling beutiful grounds designed for ultimate privacy and tranquility. Thoughtful landscape lighting, a lush new lawn, and a restored gazebo-expertly stabilized with masonry work and illuminated for evening ambiance-create an unforgettable first impression. Inside, the home has been meticulously enhanced with freshly sanded and stained hardwood floors and custom details throughout. The sun-filled main level exudes elegance, while the reimagined primary suite offers a true spa-like retreat with a new chandelier, re-grouted showers, and custom niches in each stall. Smart-home convenience is fully integrated, with a whole-house Lutron automation system and new TVs throughout for seamless living. The finished lower level is equally impressive, designed as both a wellness retreat and an entertainer's dream. It features new flooring throughout, a professional-grade home gym with a viewing window to the billiard room, and a stylish custom bar area with leveled flooring and an integrated sink. The attached garage has been upgraded with a gleaming epoxy floor, fresh paint, and smart tech integration-perfect for car enthusiasts or hobbyists alike. Outdoor living is elevated with a brand-new pavilion for al fresco dining, a full irrigation system for lush grounds year-round, and multiple vantage points to take in breathtaking sunsets over the Sound. Whether relaxing by the gazebo, hosting under the pavilion, or strolling the expansive, private grounds, this estate delivers an unrivaled lifestyle defined by luxury, seclusion, and natural beauty. Lion's Gate on the Sound is more than a home-it's a legacy property offering unparalleled privacy, sophisticated upgrades, and sweeping waterfront views. Perfectly located near the North Fork's vineyards, farm stands, and charming village life, this extraordinary residence is ready for its next chapter. Pool Permit Pending.