The build is complete - welcome to 18 Sound Beach Avenue! This exceptional NEW 4-bedroom, 3.5-bathroom home has been fully reconfigured and thoughtfully designed with modern elegance and functionality in mind. The exterior showcases timeless white James Hardie siding, sleek black windows, and clean architectural lines that create striking curb appeal. Step inside to a bright, open-concept main level featuring white oak hardwood floors throughout. The stunning modern kitchen flows seamlessly into the dining and living areas, highlighted by a unique serving window and large French doors that open to an expansive rear deck - perfect for effortless indoor-outdoor entertaining. Upstairs, you'll find a serene primary suite complete with a luxurious en-suite bath. Two additional bedrooms and another full bath are on the upper level. The finished lower level offers a private fourth bedroom with an en-suite bath, laundry hookups, and a spacious additional room ideal for a home office, playroom, or even a full in-law suite. Enjoy Connecticut's weather in the beautifully landscaped backyard, overlooked by an oversized deck designed for relaxing or hosting gatherings. Located in highly sought-after Old Greenwich, this home is just moments from top-rated schools, scenic beaches, parks, and the vibrant local shops and restaurants the community is known for. Don't miss this rare opportunity to own a luxurious, turnkey home in one of Connecticut's most desirable neighborhoods.