This fortification first appears in historical records on the 1654-9 Down Survey map of Moygoish barony, where it’s depicted as a castle standing on a flat-topped hill. The map identifies the land as belonging to Robert Uriell, noted as an ‘Irish papist’, and the parish terrier confirms that Kilbixy parish housed two castles; one here in Cominstown and another in Kilbixy itself.

By 1837, when the Ordnance Survey Fair Plan was drawn up, the castle had already fallen into ruin, marked simply as ‘Site of Old Castle’ within an area known as the Castle Field. The original OS 6-inch map from the same year shows it as a square structure in the southern part of the field, though later editions seem to have mistakenly shifted its location westward. Today, visitors to the site will find modest remains: a small square area measuring roughly 9 by 8 metres, defined by grass-covered wall footings that form a right angle, with one foundation running east to west and another perpendicular to it.

The castle’s strategic position becomes clearer when considering its surroundings. Just 250 metres to the northeast lie the earthworks of a deserted medieval settlement, whilst the townland boundary with Baronstown runs a mere 75 metres to the east. Modern aerial photography from 2011 reveals that the castle ruins sit immediately southeast of a large circular enclosure, suggesting this hillock may have hosted multiple phases of occupation throughout its long history. A low scarp visible to the east of the ruins hints at additional defensive features that once protected this medieval stronghold.