Welcome to 12 Sandy Lane, a peaceful retreat on a quiet cul-de-sac in one of Marlborough's most sought-after neighborhoods. This beautifully maintained 4-bedroom, 3-bath colonial borders Salmon River Conservation land, offering privacy and a serene connection to nature. Inside, you'll find warmth and charm throughout. The inviting family room features rustic wood beams and a brick fireplace. The spacious kitchen is both functional and welcoming, with plenty of room for casual dining. Just off the kitchen, the enclosed sun porch, added in 2007, is a tranquil spot to enjoy coffee and watch the local wildlife. The formal dining room is perfect for entertaining, and a first-floor bedroom adds flexibility for one-floor living or use as a den. This home has been thoughtfully updated: furnace and hot water heater (2007), bathrooms (2010, 2014, 2017), roof and gutters (2013), windows (2014), driveway (2016), Kloter shed (2015), mini-split A/C (2018), generator (2021), exterior paint (2022), and well tank (2023). Upstairs, the bedrooms are light-filled and inviting. The full walk-out basement with large windows offers excellent potential to finish. With timeless updates, nature at your doorstep, and the town tennis court nearby, 12 Sandy Lane is the place you'll love to call home.