The Killiane Castle complex comprises of a Norman tower house, a bawn and an early 17th century house .The castle tower is approximately 50ft high and measures 39ft x 27ft externally, with walls 4ft to 9ft in thickness. It was built around 1470 and is probably one of the “£10 castles”- a grant of £10 being given by King Henry VIII for the building fortresses in his kingdom.
The castle contains only one original window all the others having been altered. This window is an ogee style window of the 15th century, with two lights. The main entrance to the castle was on the east side, now bricked up, it provided an adjoining door to the house at one time. A new door has been opened on the south side of the tower.
On the ground floor underneath the stair way , is a dungeon. From this a passageway leads to a door, now bricked up which adjoined the house. The stairs in the east wall is well maintained. The ceiling of the ground floor loft is vaulted. On the first floor is another doorway, again bricked up, adjoining the house. On this floor there is also a garderobe. A brick fireplace has been installed in a corner of this room with its chimney rising inside the building.
The third floor contains a fine granite fireplace, the chimney rising on the outer wall is lined with small smooth stones from the beach. This floor also contains a cupboard recess. The roof, originally of slate has been replaced by corrugated iron. The parapet consists of large sloping slabs and the battlements are of the steeply stepped type with a square turret on each corner. On the outside of the southern turret is a carved head. There are murder holes over each of the doors on the ground hoot.
The large bawn has a round tower on the south east corner and a square tower on the south west corner, castle occupying the north west corner. The north east tower has been removed as has the northern apron wall to accommodate the facade of the house.
The original 17th century house consisted of two storeys with garret on top. At some stage the roof was raised to incorporate the original dormer windows of the garrets into a third storey. The great slant of the original 17th century Roof was also reduced. The staircase of the house is of a simple very wide design of the 17th century. Nearby stands the ruins of the small medieval church of ST.Helen’s which was in ruins by 1835 it and its adjoining cemetery were enclosed by a wall and is reputed to be the burial place of the Cheevers family