Betchworth Castle is a mostly crumbled ruin of a fortified medieval stone house with some tall, two-storey corners strengthened in the 18th century, in the north of the semi-rural parish of Brockham.

In 1798, Henry Peters bought Betchworth Castle and spent considerable money renovating it to be a comfortable family home.

[6] St Martin's church, Dorking has a plaque to Abraham Tucker, author of A Picture of Artless Love and The Light of Nature Pursued, who lived at his estate of Betchworth Castle until his death in 1774.

The castle was bought by banking dynasty co-heir Henry Thomas Hope to add to his Deepdene estate in 1834, who demolished part of it to reuse the building material elsewhere.

[1] The historian and topographer Malden, in 1911 wrote: "Judging by the print in Watson's 'Memoirs,' the mansion which, in the middle of the 15th century, replaced an earlier fortified house or castle, must have been extremely picturesque with its battlemented gables, clustered chimneys and oriel windows, standing among lawns and gardens descending to the Mole.

[7] Mole Valley Council, which owned the castle, sold it in 2008 for £1 to local man Martin Higgins who has undertaken to conserve the structure and grounds, with financial support from English Heritage, Surrey Historic Buildings Trust and Mole Valley District Council, together with his own and other private funds, so that the public can be admitted.