Northampton Street Lofts is a residential condominium conversion of an early 20th-century commercial structure in Boston's South End west of Mass Avenue from 2003. Units vary; however, they are all loft-style with high ceilings, open floor plan, large windows, exposed brick/beam/ductwork architectural details, contemporary kitchens, baths, in-unit laundry, and some with outdoor spaces. The association comprises 32 residences blending old and new on five floors with amenities such as professional management, elevator, and roof terrace. Northampton Street Lofts is pet-friendly with restrictions.