While only the southwest corner survives today, rising to parapet level with its limestone rubble walls and dressed quoins, this fortress once stood as an impressive defensive structure. The remaining walls, measuring just over a metre thick, showcase the sophisticated double wall construction typical of such buildings, with an inner wall of 0.6 metres and an outer wall of 0.35 metres working together to create a formidable barrier.

Historical accounts from the 19th century paint a picture of what visitors have since lost; the Ordnance Survey letters describe a complete square tower measuring 11 metres east to west and 9.7 metres north to south, soaring to an extraordinary height of 21 metres. The castle originally contained six floors, with the second floor resting on a strong stone arch whilst the others were supported by wooden beams. The windows varied between rectangular and pointed styles, with the upper storey featuring particularly large openings that would have flooded the main chambers with light.

The architectural details that remain reveal the castle's complex internal layout. A spiral staircase tucked into the southwest corner provided access between floors and connected to multiple mural chambers built within the thickness of the south wall. These chambers appeared at the third floor, fourth floor, and parapet levels, offering additional living or storage space. The stairs were illuminated by narrow defensive loops, whilst at the corner angle, a circular bartizan supported by double corbels with shot holes provided defenders with a protected position from which to rain down fire on attackers. Evidence of vaulted ceilings, arched embrasures, and the remnants of window frames in the west wall all speak to a building that balanced defensive necessity with domestic comfort, typical of the tower houses that once dotted the Irish landscape.