Various.

The Manor of Little Stanmore, also known as Canons, was sold to James Brydges in 1709. Brydges later became Lord Chandos, and in 1719 was made Duke of Chandos. However, Henry, Duke of Chandos, was forced to sell the manor and house in 1746, to pay off heavy debts. James Brydges also acquired the Manor of Great Stanmore which remained in the Chandos family until 1840.

Warren House, situated on Wood Lane, and its estates were originally part of the Manor of Great Stanmore and were leased out by the Chandos family. It was later owned by James Forbes of the East India Company. Forbes sold it in 1813, and by 1827 it was the property of the architect Sir Robert Smirke who also held 23 acres in Great Stanmore and 108 acres in Little Stanmore. It was then owned by Charles Keyser, banker Henry Bischoffsheim, and his grandson Major General Sir John Fitzgerald. In 1937 Fitzgerald sold 123 acres of land to Harrow Urban District Council as part of the Green Belt; and then in 1951 sold the house with 11 acres of land to the National Corporation for the Care of Old People.

Source: A History of the County of Middlesex: Volume 5: Hendon, Kingsbury, Great Stanmore, Little Stanmore, Edmonton Enfield, Monken Hadley, South Mimms, Tottenham (1976), available online.