437 D Street Lofts is a residential condominium conversion of an early 20th-century factory building situated in Boston's Seaport District completed in 1994. Units modern vary; however, they possess industrial period details such as soaring cast concrete ceilings, large windows, polished concrete floors, exposed mushroom columns, and open floor-plans. The association comprises 38 residences on seven floors with amenities such as a shared roof deck, garage, and elevator. 437 D Street Lotfs is pet-friendly with restrictions.