 Edward Willes died in 1820, and his son, also Edward, began to sell parts of the estate for building in 1823 as Leamington grew into a spa town.In all the Willes family held Newbold Comyn for over 400 years, until they sold most of the remaining estate to Leamington Corporation after the end of the Second World War.The Willes family moved to Honington in South Warwickshire, and sold the mansion house to a subsidiary of AC Lloyd (Builders) in 1964.