Highgrove House was the family residence of King Charles III and Queen Camilla. It lies southwest of Tetbury in Gloucestershire, England. Built in the late 18th century, Highgrove and its estate were owned by various families until it was purchased in 1980 by the Duchy of Cornwall from Maurice Macmillan. Charles III remodelled the Georgian house with n…Highgrove House was the family residence of King Charles III and Queen Camilla. It lies southwest of Tetbury in Gloucestershire, England. Built in the late 18th century, Highgrove and its estate were owned by various families until it was purchased in 1980 by the Duchy of Cornwall from Maurice Macmillan. Charles III remodelled the Georgian house with neo-classical additions in 1987. The duchy manages the estate and the nearby Duchy Home Farm.