Charming 1941 Colonial with Exceptional Modern Upgrades and Greenhouse Oasis. Nestled on just under an acre in one of North Haven's most desirable neighborhood's, 12 Marlborough Rd. Is a timeless 1941 Colonial beautifully enhanced with over two decades of thoughtful improvements-where classic charm meets modern luxury. Step inside to discover 3 spacious bedrooms, 2 full and 1 half baths, with an expanded family room and loft area that features arched windows, gleaming hardwood floors, elegant trim work, and custom built-ins with new accent lighting. The open layout offers a perfect flow for both a relaxing and entertaining feel, including recent upgrades new ceiling fans and fixtures(2024), cozy pellet stove and a hookup wet bar sink for future customization. Further on the main floor a convenient laundry room and newer Subzero refrigerator completes the main level. Whether you are working from home or need to unwind in the stunning custom-built library and office space, featuring walls of floor-to-ceiling bookshelves. The home also boasts a gas fireplace, French doors, with architectural detailed built-ins throughout. This updated and crafted space connects seamlessly to the recently reset and expanded blue stone patio, making it a true indoor-outdoor living experience.