House & Family History: Between 1955 and 1998 Tewin Water was occupied by the Hertfordshire County Council's School for the Deaf.
John Preston (J.P.) Neale, published under the title of Views of the Seats of Noblemen and Gentlemen in England, Wales, Scotland, and Ireland, among other titles: Vol. II, 1819.
House Listed: Grade II
Park Listed: Grade II
Past Seat / Home of: William Cecil, 18th century. James Fleet, 18th century. Edmund Bull, 18th century. George Nassau Clavering-Cowper, 3rd Earl Cowper, 18th century. Alfred Beit, 20th century; Sir Otto John Beit, 20th century; Beit family here 1902 to 1946. Mr. A.H. Adey, 20th century.
Current Ownership Type: Corporation
Primary Current Ownership Use: Flats / Multi Family
House Open to Public: No
Historic Houses Member: No