Welcome to your quiet and serene getaway atop a hill in the picturesque community of Sonata. This beautifully maintained split-level home combines modern upgrades with timeless charm, offering a unique opportunity to own one of the newest homes in the neighborhood, completely rebuilt in 2007, while most surrounding homes date back to the 1980s. The upper level features a spacious primary suite with an ensuite bathroom, a comfortable guest bedroom, and a full guest bathrooman uncommon layout thoughtfully incorporated during the home's 2007 rebuild, as this floor plan originally lacked a second upstairs bedroom. The main living area boasts an expansive, open layout with a sunken living room highlighted by soaring cathedral ceilings. An oversized dining area seamlessly connects to the kitchen, creating a perfect space for entertaining or day-to-day living. Both the first and second floors showcase breathtaking westerly views of the San Dieguito Hills and stunning sunsets that will leave you in awe. On the lower level, you'll find an additional oversized family room or office, perfect for work or relaxation, along with two more generously sized bedrooms and a full bathroom. The serene backyard provides the ideal setting for entertaining guests or simply unwinding in peace. Located just a short drive from all the best amenities, including North County Mall, Kit Carson Park, The Vineyard Golf Course, shopping, dining, and more, this home offers unmatched convenience while maintaining its peaceful and elevated setting. Powered by a fully owned 7.68 kW solar system, this home is energy-efficient and cost-effective. Pride of ownership is evident throughout, with all maintenance up to date and many thoughtful upgrades. Six western-facing windows were replaced in 2019, and two skylights updated in November 2024 to enhance natural light. The lower-level carpet was refreshed in 2019, and the mid-level and stairway carpet replaced in 2024, providing a fresh, modern feel. Garage door operators were replaced in June 2023, and kitchen and laundry appliancesincluding the refrigerator, dishwasher, washer, and dryerwere updated in 2019. The hot water heater was replaced in January 2024, and the original heating and air system has been well-maintained and remains in excellent condition. 4027 Alton Way is a true gem, offering comfort, style, and functionality in a highly sought-after location.