The present structure is thought to date from the early 1600s during the reign of James I but it replaced an earlier castle on the same site and some of the earlier features are incorporated into it. It is a typical tower house and there were defensive outworks and a causeway on its approach. After the plantation of Munster and the fall of the Earls of Desmond, the lands at Lough Gur were granted to Sir George Bouchier, son of the second Earl of Bath. It is on the OPW list for restoration. Bouchiers Castle defended the eastern entrance to Knockadoon.
This dates to the 13th century. The ruined remains now consist of an enclosed bailey/courtyard with turreted defences and corner towers. It was one of the chief seats of the Earls of Desmond. It was to Black Castle that the Earl Gerald and Lady Eleanor returned having escaped from English captivity in Dublin in 1572 and changed their English clothes to the saffron of the Irish and received a tumultuous welcome. Black Castle controlled the western approaches to Knockadoon.