In 1341 Oct 18, Reginaldus de Codham (Lord Cobham) was granted, by Edward III, (In year 15 of his reign) a Royal licence to crenellate Orkesdene (Orkesdene)

"Licence for Reginald de Cobharn to crenellate his dwelling-places (mansum) of Pringham and Orkesdene."

Granted at Westminster, by privy seal.

Reginaldus de Codham was granted a licence to crenellate his 'mansum' at Orkesdene, Kent in 1341 - with Pringham. Orkesdene was a sub manor with Eynsford manor. I can find no record of a specific location for Orkesdene but I wonder if the Tudor mansion, later called Lullingstone House, was built on the site of house. Emery places this at Austin Lodge.

Original source is

• Calendar of Patent Rolls (1340-43) p304

(In fact, the original source given is usually a transcription/translation of what are precious medieval documents not readily availably. It should be noted that these transcription/translations often date to the nineteenth or early twentieth centuries and that unwitting bias of transcribers may affect the translation. Care should also be taken to avoid giving modern meaning to the medieval use of certain stock words and terms.)

Significant later source are;

• Emery, Anthony, 2006, Greater Medieval Houses Vol3 (Cambridge) p439
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol3 pt2 p413

More details about licences to crenellate can be found here.

Please let me know if you see any errors, can add information or can otherwise help to improve this resource. Contact me