Welcome to 661 Grand Avenue, a rare offering in the heart of Belmont Heights. This property stands out with its fully permitted Accessory Dwelling Unit (ADU)—a unique feature in this sought-after neighborhood. Whether you're seeking rental income, multigenerational living, or a dedicated home office, the hard work has already been done for you. The main home offers 1,532 square feet of well-designed living space, including 3 bedrooms and 2 bathrooms. From the moment you arrive, the property impresses with its strong curb appeal and low-maintenance front yard. Inside, a bright, flowing floor plan is enhanced by abundant natural light and timeless charm. The detached ADU adds an additional 440 square feet with 1 bedroom and 1 bathroom—ideal for guests, tenants, or flexible use. Additional highlights include a new 220-amp electrical panel, EV charger, newer central heat and air conditioning, and a generous 6,751 square foot lot. Located within walking distance of award-winning schools, local shops, restaurants, and coffee spots, 661 Grand Avenue combines functionality, character, and a prime location—making it a truly exceptional opportunity in Belmont Heights.