Built from uncoursed limestone rubble and greywacke, the castle follows a sub-rectangular plan with distinctive rounded projecting towers at each corner. Whilst the building remains inhabited and has lost much of its original character through renovation, careful observation reveals the bones of its medieval past beneath the modern additions.

The castle’s defensive design becomes apparent when examining its original layout. Entry was once gained through a doorway at the eastern end of the south wall, leading directly to a barrel-vaulted ground floor and the main stairwell housed within the southwest angle tower. This stairwell, accessed through a two-centred arch of hammer-dressed limestone, still retains its upper steps though the lower section between ground and first floors has been removed. The northeast tower contained garderobes at multiple levels, with remnants still visible in a short mural passage on the second floor. Wooden floors once spanned the second and third levels, supported by stone corbels projecting from the walls, though these internal features have largely disappeared over time.

At parapet level, the castle reveals more of its original defensive features. A central projection on the north wall rises above the battlements and houses chimney flues, whilst the southwest tower extends higher still, originally containing an upper chamber reached by steps built into the northern parapet wall. Though the crenellations visible today are recent additions rather than medieval survivals, they echo the castle’s original military appearance. Archaeological surveys conducted in the 1980s and early 1990s have helped piece together this picture of the castle’s medieval form, revealing how this seemingly modern residence still carries within its walls centuries of Irish history.