The Fawsydes sold the castle in 1631 to an Edinburgh burgess and merchant called Hamilton. By the 19th century it had fallen into ruin, and was close to being demolished altogether in the 1970s. However, the castle was bought and restored by Thomas Moodie Craig. Author and historian Nigel Tranter set up the Fa'side Restoration Society in 1970 through the St. Andrews Society of East Lothian, and introduced Craig to the castle in 1975. After investigation it was discovered that the original name of the castle was Fawside Castle. The restoration work began in 1976 was completed by 1982.