The Marlborough is a full-sevice residential condominium conversion of a 19th-century apartment building in Boston's Back Bay neighborhood where Mass Avenue and Marlborough cross from 1989. Units feature efficient layouts, period details, high ceilings, large windows, contemporary kitchens/baths, in-unit laundry, and HVAC. The association comprises 72 residences on eight floors with amenities like concierge services, roof terrace, fitness center, on-site superintendent. The Marlborough is pet-friendly with restrictions.