This four-storey limestone fortress, built from roughly coursed rubble with rounded corner stones, measures approximately 9.85 metres north to south and 8.7 metres east to west, with walls nearly two metres thick. The defensive features are particularly impressive; bartizans project from the northwest and southeast corners, whilst a machicolation overhangs the main doorway, allowing defenders to drop projectiles on unwelcome visitors below.

The castle’s entrance reveals sophisticated defensive planning typical of 17th-century fortifications. A two-centred archway with chamfered, punch-dressed stone jambs leads into a lobby equipped with a murder hole overhead and a narrow defensive opening in the wall. To the northwest, a well-preserved guardroom remains accessible through its original flat-headed doorway. The ground floor, reached from the lobby’s eastern end, features narrow slit windows set into segmental-arched recesses, each flanked by shot-holes for firearms; a telling detail that dates at least some modifications to the age of gunpowder. A spiral staircase in the northeast corner provides access to all upper floors, including the second storey with its barrel-vaulted ceiling and the remnants of a fireplace in the western wall.

The upper levels reveal both defensive and domestic arrangements. A mural passage on the second floor leads to a garderobe in the southeast corner, whilst the third floor, positioned above the barrel vault, contains another ruined fireplace topped by a tall rectangular chimney. Interestingly, the small gable-ended chimney stacks appear to have been purely decorative, suggesting that even in uncertain times, the castle’s builders weren’t above a bit of architectural showing off. Though no trace of a bawn wall survives, the drystone field fence to the east may well incorporate rubble from such a structure. The stonework throughout shows evidence of punch dressing with drafted margins, a technique that firmly places the castle’s construction, or at least its final modifications, in the seventeenth century.