Rare opportunity to own a spacious 4-bedroom, 3.5-bath Colonial offering over 3,700 sq. ft. of living space, plus an additional 432± sq. ft. of finished flex space above the detached 2-car garage. A bath on every level! Located in one of Southborough's established neighborhoods, this home features central air (2024), 42 new Harvey windows (2016), a new roof (5/2026), and a new 4-bedroom septic system to be installed in August 2026. The renovated kitchen with gas cooking opens to a dramatic two-story barn-board family room with a gas fireplace. Formal living and dining rooms, two staircases, and a finished walk-out lower level with a game room, billiard area, wet bar, and full bath provide exceptional space for entertaining. Outside, enjoy a 16' x 32' saltwater in-ground pool with a new liner (6/2026), a composite deck with a full awning, and a beautifully landscaped 0.88-acre lot abutting conservation land, the Sudbury Reservoir, and walking trails. Minutes to the MBTA Commuter Rail, Route 9, I-90, and I-495.