Coordinates: 51°24′58″N 0°32′42″W / 51.416°N 0.545°W
Great Fosters is a 16th-century mansion which originally lay within Windsor Great Park and is still adjacent to the town of Egham, Surrey, England. It is a Grade I listed building, close to Heathrow and the M25 London orbital motorway.
Great Fosters was the London seat of Sir John Dodderidge (1555-1628), a Judge of the King's Bench and formerly Solicitor General to King James I. He had been brought up in Barnstaple, in North Devon, and purchased the estate of Bremridge near South Molton, Devon, as his country estate. His epitaph on his monument in Exeter Cathedral states "He departed this lyfe at Forsters nere Egha(m) in Surrey". Sir Robert Foster owned the house in 1639. When he died in 1663 he left the house to his son, Sir Thomas Foster. Great Fosters remained in the family following his death in 1685 when it passed to his daughters. In 1715, Sir Charles Orbey resided here, and it was not until 1787 that one of Sir Thomas’ great grandsons sold the property to a Mr Wyatt for £700.
Early in the 20th century, Great Fosters was owned by Baroness Halkett, Queen Alexandra’s lady in waiting. Later it passed to the Earl of Dudley and then to the Hon. Gerald Montague. Today it is owned by the Sutcliffe family.