The 1656 Down Survey parish map of Rahugh depicts this tower house castle atop a small hillock, marking lands that belonged to Art Mc Hugh Geoghegan, Thomas Geoghegan and Conly Keegan; all described as Irish papists in the documentation of that era. Today, only portions of this once imposing rectangular tower survive, with the northeast and southwest corners still standing at heights of 3.5 metres and 9 to 10 metres respectively.

The castle’s construction tells the story of medieval Irish building techniques, with walls built from random rubble featuring rounded corners and a pronounced base batter, much of which has unfortunately been robbed out over the centuries. The rectangular tower originally measured approximately 8 metres north to south and 5.5 metres east to west internally, with walls about a metre thick. Whilst the eastern wall has been reduced to low footings and the northwest corner collapsed sometime before 1910, as recorded on Ordnance Survey maps of that period, the surviving stonework reveals interesting architectural details including a foundation plinth that extends 20 centimetres beyond the wall face and what appear to be the remains of a chimney flue in the southwest corner at ground level.

Historical maps provide intriguing glimpses of the castle’s former context; the 1837 Ordnance Survey shows the tower house positioned at the southwest corner of a small rectangular enclosure or field, though no trace of this boundary survives today. Dense ivy now obscures much of the remaining structure, making it difficult to discern other architectural features that might help piece together the castle’s original appearance and function. From its elevated position, the castle once commanded excellent views from east through south to west, a strategic advantage that would have been vital to its medieval inhabitants.