What remains today is a fascinating jumble of structures spanning from the 16th to the 19th centuries, all arranged around a courtyard that still functions as a farmyard. The site, now owned by the IDA in an area zoned for industrial development, contains the remnants of the original tower house, defensive bawn walls, and the later Castle Warren house built in 1796.

The oldest surviving structure, tucked into the southwest corner of the complex, appears to be a two-storey tower house measuring roughly 10.5 by 6.6 metres, though it shows considerable evidence of rebuilding and conversion into agricultural use. More impressive are the late 16th or early 17th century domestic quarters along the southern edge, which feature an intriguing array of architectural details including multiple fireplaces, a brick-domed bread oven, and two corner bartizans supported by tapering corbels. One of these corner towers, accessed through a pointed-arch doorway, showcases the defensive architecture of its time with its corbelled stone roof. The 18th century Castle Warren house, built directly over the earlier bawn wall foundations, presents a more refined five-bay Georgian façade, though its hipped roof has long since collapsed and ivy now claims much of the structure.

The castle’s history is equally compelling; built by the de Cogan family, possibly by Richard de Cogan who was lord of the manor in 1536, it remained in their hands until 1642. That year, the garrison of 40 men surrendered to Lord Inchiquin after artillery fire convinced them resistance was futile, with the victors discovering an impressive cache of 1,000 barrels of wheat stored within. Among the more curious artefacts associated with the site are a carved mailed head sold in the 1920s and a possible sheela-na-gig discovered in the early 19th century, though this disappeared shortly after its finding, adding an element of mystery to this already evocative ruin.