 The architect John Sedding remodelled the castle between approximately 1885 and 1890, creating a Gothic styled house, adding another storey and a new wing.After Crichton's death in 1922 his wife remained in the house until her death in 1936, when the property and the surrounding grounds were sold at auction.Middlesex County Council bought the castle in 1939 and converted it into a nursing home for elderly men; it passed into the control of the National Health Service in 1948 and continued to be used as a nursing home.