Set along the coveted Carriage Lane of Commonwealth Avenue in prestigious West Newton Hill, 1611 Commonwealth Avenue offers an exceptional blend of architectural character, generous living space and modern comfort. Situated on a beautifully landscaped, level one-third-acre lot, this impressive five-bedroom, three-bath residence offers nearly 3,500 square feet of living space across three thoughtfully designed levels. A highly desirable first-floor primary suite anchors a spacious main level featuring a sun-filled living room with fireplace, elegant dining room, private home office and beautifully renovated four-season sunroom showcasing custom birch and maple millwork overlooking the grounds. Two additional first-floor bedrooms provide flexibility, while the upper level offers two generously sized bedrooms and a full bath. The recently finished lower level features an expansive family room with a second fireplace, recreation and fitness space, separate exterior entrance, laundry and workshop, plus plumbing provisions for a future bathroom. Hardwood floors, central air, 200-amp electrical service, a centrally monitored security system and an attached two-car garage complement numerous improvements, including a 2015 roof, rebuilt chimney, renovated staircases and recent interior and exterior painting. Outside, a spacious fenced backyard and mature landscaping create an inviting setting for entertaining and everyday enjoyment. Ideally positioned near Peirce Elementary, Brae Burn Country Club and West Newton Square, with convenient access to Newton Centre, Newtonville, the Mass Pike and Boston. A rare opportunity to enjoy exceptional space, flexible living arrangements and timeless character in one of Newton's most sought-after neighborhoods.