[5][6] In 1792, a site to the south-east of the nucleus of the current settlement was selected by architect Benjamin Henry Latrobe and his commissioner, John Sperling, as the location on which they would build Hammerwood Park, a country house which was one of the first examples of Greek Revival architecture in Great Britain (it was Sperling who originally coined the name 'Hammerwood').

Clement Colby Woodland of Corpus Christi College, Cambridge), as well as for a number of other buildings in Holtye and East Grinstead.

[14] During the Second World War, on 2 March 1944 a Heinkel He 177 of the Luftwaffe's Kampfgeschwader 100 on a bombing mission to London was shot down over Hammerwood by a Mosquito Mk XIII of No.

[15] Hammerwood Park was requisitioned for use by the armed forces during that war, becoming home to 200 soldiers (including the cricketer Denis Compton, and a contingent from the Canadian Army).

[21] Hammerwood Park has been open to the public since 1983; tours take place at least twice weekly in summer, and musical events are held regularly.

[23] St Stephen's Church held its last service on 20 March 2016 (Palm Sunday), and the parish (which encompassed the villages of Hammerwood and Holtye) was dissolved later that year.

[24][25] In November 2016, the Secretary of State for Culture, Media and Sport decided to upgrade the Listing for St Stephen's Church to grade II* due to its architectural merit, preservation and connection to the historic estate.

[29] Much of the settlement is set along a lane running south from the A264, which links the hamlet to East Grinstead, Tunbridge Wells and beyond.

[30] Go Coach operates a thrice-daily 234 service from opposite the White Horse Inn in Holtye (approximately 45 minutes' walk east from Hammerwood) to Cowden, Edenbridge, Tunbridge Wells and surrounding villages as well as a daily 238 service to Cowden, Edenbridge, Chartwell and Sevenoaks.