In 1330 a Sir Ralph de Bulmer obtained a charter of his desmesne from King Edward III[3] acknowledging his ownership of the estate.

Sir Ralph carried out further alterations to the building and obtained a licence to crenellate from King Edward III allowing him to make the manor house into a castle.

[3][4] All estates including Wilton estate were forfeit to the crown following the attainder and execution of Sir John and Lady Bulmer on 25 May 1537, for high treason under the 1534 Act of Supremacy, arising out of their part in the Pilgrimage of Grace, in protest against King Henry VIII's break with the Roman Catholic Church.

The whole of the east wing including the octagonal tower was later demolished and replaced by 1887 with amongst other rooms a pavilion ballroom to create essentially the building that exists today.

[6] Colonel Lowther sold the estate including Wilton Castle, his private residence in 1945 to Imperial Chemical Industries.

[3] The offices were occupied at various times by major industrialists such as Dr Richard Beeching and Sir John Harvey Jones.

The golf club was acquired by its members, and over the period 2001–2002 Wilton Castle was converted by George Wimpey Ltd into 45 apartments and houses.

[7] There is no remaining evidence of the building of 1210, but internal walls to the east of the entrance are particularly thick and it is thought they constituted part of the original tower.