Historical records confirm the castle's existence as early as 1574, when it belonged to one William O'Kelly, a member of the prominent Gaelic family who controlled much of this region during the medieval period. Today, only sections of the western wall remain standing, stretching approximately 16 metres in length, with a short perpendicular section extending northeast that likely formed part of the original structure.

The surviving masonry offers tantalising glimpses of the castle's former character through its few remaining architectural details. A simple lancet window punctuates the ground floor level, its narrow pointed arch typical of medieval Irish castle construction. Above, on what would have been the first floor, a recess for corbels indicates where timber beams once supported an upper chamber floor or perhaps a defensive wall walk. These modest features suggest a building that balanced defensive requirements with domestic comfort, as was common in tower houses and smaller castles of the period.

The castle's ruins have not stood in isolation; a farmhouse with accompanying outbuildings was constructed to the east of the ancient wall, incorporating the medieval remains into the agricultural landscape. This practical reuse of old stonework reflects centuries of continuous habitation and adaptation at the site, where medieval fortification has given way to pastoral farming whilst maintaining a tangible link to Callow's distant past.