Unique opportunity in desirable Merrimack! This well-maintained 1920 Cape offers the flexibility and versatility that today's buyers are seeking, featuring a rare legal Accessory Dwelling Unit (ADU)-perfect for multigenerational living, extended family, guests, or supplemental income potential (buyer verify with town of Merrimack) . The main home offers 3 bedrooms, 1 full bathroom, and hardwood flooring throughout. Added in 2012, the attached ADU provides a private living space complete with a full kitchen, living area, 1 bedroom, and 1 full bathroom. Situated on a 2-acre lot, approximately .61 acres of fencing (2021), creating an ideal outdoor space for privacy, pets, recreation, and entertaining. Additional exterior features include a circular driveway and a recently expanded and repaved driveway (2024), providing ample parking for residents and guests. Additional updates include a new furnace in the main house (2024) and a new water heater in the ADU (2026). Public water, public sewer, and natural gas add convenience and efficiency. Enjoy all the benefits of living in Merrimack, with easy access to major commuting routes, shopping, dining, parks, and recreation while still enjoying the space and privacy of a larger lot. A property offering the combination of flexibility and a legal ADU is a rare find.