 A NYC based real estate developer The Bluestone Group, has been actively acquiring buildings in the Port Morris and Mott Haven area, purchasing large warehouse buildings for conversion to creative office space, charter schools, hotels, as well as housing.in June 2016 Bluestone purchased the 275,000 square foot former Union Standard Equipment Co. building at 825 East 141st Street for $44 million.The Piano District is the name proposed by two developers for Port Morris.