This expansive 5-bedroom home, easily used as a 6-bedroom, offers three levels of flexible living space. Located in the heart of Harvard Square, it blends preserved original details such as high ceilings, crown moldings, and a grand staircase with modern updates completed in 2023. Recent improvements include new windows, central AC, skylights, insulation, flooring, and fresh paint. The main level features a full bath, updated kitchen, formal dining room, living room, and den. The second floor offers four sunlit bedrooms and two full baths. The third floor boasts a private loft with a full bath and kitchenette--ideal for guests, an au pair, or an office. Additional highlights include a full basement for storage, in-unit washer/dryer, parking for multiple cars, and a generous backyard--rare in this desirable Cambridge location. Matterport Tour Available upon request!!