Bridgewater House was built in 1771, The canal was opened to the Mersey in 1773 and completed throughout its length in 1776. After the Duke's death in 1803 the house was used as offices by the Bridgewater Trustees, and from 1872 by the Bridgewater Navigation Company. In 1887 the assets of this company, including the house, were bought by the
Manchester Ship Canal Company, who used it mainly for the purpose of entertaining. At the outbreak of the Second World War, part of the house was taken over by the Balloon Section of the
Royal Air Force. In 1943 the whole house was requisitioned by the
Air Ministry. After the war the house returned to the ownership of the Manchester Ship Canal Company and its future became uncertain. In 1998 a fire damaged the roof and many of the rooms. ==Architecture==