The main surviving free-standing structure is the two-storey gatehouse leading to the enclosure in which the castle stood.

The result of this conflict left Richard in control of Rathcoffey and Anne and her successors in the Eustace family in possession of the Wogan lands of Clongowes Wood.

After the death of her first husband Oliver Eustace, Anne remarried Sir Robert Dowdall.

[4] They were equally unsuccessful in regaining their Welsh stronghold, Picton Castle, which was held by Anne's sister Katherine and her husband, Owen Dunn.

[citation needed] During the Wars of the Three Kingdoms (1640s) the Wogans sided with Parliament, and Colonel Monck's army marched on Rathcoffey castle, laying siege to it.

Archibald Hamilton Rowan (later a leading United Irishman) bought it from him in 1785 and built a new mansion on the site of the Castle incorporating the Wogan dwelling in this structure.

[citation needed] It later passed between numerous owners before coming into the possession of the Society of Jesus (Jesuits) and then being sold to a local farmer in the 1970s.