Clandon Park is an early 18th-century grade I listed Palladian mansion in West Clandon, near Guildford in Surrey, England. It was long a seat of the Onslow family. It has been owned since 1956 by the National Trust. The house was substantially damaged by fire in April 2015, which left it "essentially a shell". In January 2016, the National Trust announced that some of the principal rooms on the ground floor would be fully restored to the original 18th-century designs, and upper floors will be used for exhibitions and events.