The wall features a curious dip in front of its northern side, which might be a natural formation, though some historians suggest it could conceal earlier defensive works. The castle’s main entrance likely stood where the modern road now cuts through the wall to the west, whilst halfway along the curtain, a mural tower still displays its medieval garderobe chutes at ground level, with a flat-headed window visible in the adjacent wall section.

The castle’s most impressive feature is the large rectangular tower at the southwest corner, measuring 7.5 metres east to west and 5 metres north to south, with a smaller turret attached to its corner. Though only the ground floor survives, visitors can still trace the original doorway in the south wall and spot remnants of the spiral staircase in the northeast corner. The tower’s construction shows sophisticated medieval building techniques; the walls corbel inwards at the top, capped with a series of lintel stones. At the southeast corner, another rectangular tower clings to the steep eastern slope, though its western half has largely collapsed. This tower contains two small garderobe chambers at its eastern end, roofed in the same corbelled style as the main tower, with simple square-headed windows providing light.

Dundeady Castle belonged to the Barry family and saw considerable action during the Confederate Wars. In 1642, Irish Confederate forces captured and demolished parts of the castle, but Parliamentary forces quickly retook it shortly afterwards. Today, the level area behind the curtain wall, which once served as the castle’s inner ward, has been repurposed as a farmyard, though the low rock escarpment that defined this space remains visible, marking out the footprint of this once-formidable coastal fortification.