This three-storey limestone fortress rises in oblong form, measuring roughly 4.8 metres north to south and 4.1 metres east to west, with a northeast turret housing its spiral staircase. The tower’s construction showcases skilled medieval masonry work, built from coursed stone with carefully dressed limestone quoins at the corners, whilst remnants of its defensive bawn wall still survive at the northern corner.

The castle’s interior reveals the practical yet sophisticated design typical of Irish tower houses. Entry through a pointed arch doorway on the north side leads to a vaulted ground floor chamber, lit by narrow square-headed windows and featuring a built-in wall press for storage. Originally, residents would have accessed the upper floors via an external stairway connecting to the stair turret at first-floor level. The upper chambers contain fireplaces on the eastern walls, deep window embrasures for defence, and garderobe chutes in the northwest corners; practical medieval toilets that discharged waste outside the walls. The third floor opens onto battlements, providing both defensive capabilities and commanding views across the demesne. Victorian antiquarian Ball documented several intriguing carved features in 1917, including a chamfered corner with a weathered floral finial, a crude human face projecting from the eastern wall, and an ornate trefoil window with ogee curves in the upper chamber’s south side, though these details now lie hidden beneath dense vegetation.

Archaeological investigations in 1998 revealed fascinating layers of history beneath and around the castle. Testing north of the tower uncovered a cobbled area with fragments of gravel-tempered pottery and evidence of a mortared plinth, possibly supporting a gallery structure at the castle’s front. The construction site itself shows signs of careful preparation, with stone chippings laid to create a level building surface over an earlier layer of burning on the bedrock. Most intriguingly, the discovery of 13th and 14th-century medieval pottery sherds, particularly concentrated south of the castle, along with areas of burning to the west and east, suggests the site saw significant activity well before the current tower house was erected, hinting at an earlier medieval settlement or structure that predated the White family’s fortress by perhaps two centuries.