The castle appears on the Down Survey maps of 1656-8, depicted as a prominent tower in the parish of Clongill within Morgallion barony. By 1640, the property had grown to encompass 388 acres and included both a castle and mansion house, with James White of Clongill likely residing there whilst Lord Barnwall, Alexander Plunkett of Gibstown, and John Proudfoot held mortgages on the estate.

The tower house itself is a compact fortified structure measuring approximately 6.5 metres north to south and 5.1 metres east to west internally, featuring curved angles that soften its defensive appearance. A circular stair tower rises at the southwest corner whilst a rectangular garderobe tower projects from the northeast angle. The original entrance, now blocked, was positioned towards the southern end of the western wall and included a murder hole above the entrance lobby; a defensive feature that would have allowed defenders to attack intruders from above. The ground floor retains its north-south barrel vault with visible wicker centring, and whilst the original doorway to the spiral stairs is blocked, evidence suggests a secondary doorway was later added to connect with an adjoining house to the west.

The upper floors reveal how the castle evolved over centuries, with Georgian sensibilities leaving their mark in the form of tall, brick-adapted windows that replaced the original medieval openings. The first floor preserves traces of its defensive past with windows on multiple walls and the remains of a robbed fireplace, whilst the second floor shows further modifications including enlarged windows and fireplaces in both the eastern and western walls. Though partially collapsed in 1994 and now draped in ivy, the tower house remains connected to an adjacent stone house and sits within what may have been a rectangular bawn; a fortified courtyard measuring roughly 30 by 20 metres that likely served the later house rather than the original tower. The castle’s position on level ground, with the parish church visible just 150 metres to the north-northeast, speaks to its role as both a defensive structure and a centre of local authority in medieval and early modern Meath.