In 1487 Aug 10, Sir William Stanley was granted, by Arthur, Duke of Cornwall, (In year 1 of his reign) a Chester licence to crenellate Hoton (Hooton Hall)

"ad finiendam et sursam consruendam turrem lapideam, quam inceperat construere apud manerium suum de Hoton, cum machicolationibus et battelationibus, et ad formandam et faciendam, cum omnibus aliis operi convenientibus"

Sir William Stanley obtained a licence to crenellate in 1487.

Original source is

• exchequer of Chester

(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, 2000, Greater Medieval Houses Vol2 (Cambridge) p601
  Ormerod, G., 1882 [2edn], History of the County Palatine and city of Chester (London) Vol2 p415

More details about licences to crenellate can be found here.

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