The parish church is dedicated to St George, and is architecturally Grade II listed, mostly built from the 12th to the 15th centuries, has a chancel that was repaired and made plain in 1657. The spire was rebuilt after a fire in 1947. There are wall monuments are to: Justinian Angell (d. 1680) Margaret Gainsford (d. 1691) and a wall tomb to Richard Marryott (d. 1675). A larger tomb chest is to John Gaynesford (d. 1450).
Crowhurst Place is a timber-frame Grade I listed house partly built 1425-1450 sited at the summit of a gradual slope about 1 mile (1.6 km) south of Crowhurst church. It faces the east and is surrounded by a moat. The property was conveyed for the Gainsford family of the manor who held it from 1418, having acquired it from John atte Hall and Joan (in the customs of the time, presumably his wife).
John Gainsford, who died in 1450, had a younger son William, who was Knight of the Shire (equivalent to Member of Parliament) for Surrey in the year of his father's death. His descendants were a locally irrelevant Gainsford line from Cowden in Kent. The Rev. George Gainsford of this line, retiring as vicar of Hitchin, bought Crowhurst Place about 1905. He died in 1910 and his son the Rev. G. B. Gainsford became the owner.
Tenant George Crawley, an amateur architect who also designed Westbury House on Long Island in the United States, made alterations during his residence at Crowhurst Place in the early 20th century, then expanded the building again between 1912 and 1915 for his successor as leasee, Consuelo Vanderbilt, first wife of the 9th Duke of Marlborough.
For more information, see the EN Wikipedia article Crowhurst. Includes another reference to the family of the Dukes of Marlborough.
Surrey Research Tips
Part of a list taken from GENUKI
Archives and Libraries
Administrative boundaries of the county of Surrey (Surrey History Centre)