The castle, now under state ownership as National Monument No. 458, offers visitors a glimpse into Ireland's medieval past through its weathered stone walls and defensive features.

What makes this site particularly interesting are the remnants of its bawn wall, a defensive enclosure that once protected the tower house from attack. These fragmentary walls can still be traced 1.6 metres out from the main structure on the west-northwest and north-northeast sides. The best-preserved section stands on the west-northwest side, reaching up to a metre in height and measuring 0.8 metres thick. Here, you can also spot a circular angle tower, a defensive feature that would have allowed defenders to cover multiple approaches, with a connecting wall running back to the western corner of the tower house.

The castle ruins at Cill Damhnait tell a story of medieval Irish life when such fortified homes were essential for survival. Tower houses like this one were typically built by wealthy families who needed both a comfortable residence and a defensible position; the addition of the bawn wall created an extra layer of security for livestock, supplies, and dependents during times of conflict.