Described as two-centred and punch-dressed, with hollowed spandrels and a twelve-leaf marigold drain-hole, it is a piece of careful medieval craftsmanship in an otherwise largely vanished structure. The church itself measures roughly 10.9 metres east to west and 5.9 metres north to south, with walls only 0.8 metres thick, and today little survives beyond the west gable, rising to about 3 metres in places, along with portions of the south and east walls. Architectural fragments from a destroyed east window lie scattered on the interior floor, and a wall-niche remains visible in the south angle of the east gable, small details that suggest a more complete building once stood here.

The site sits on a low outcrop of rock in gently rolling countryside, with a tower house lying to the east. That proximity may be significant. The Ordnance Survey Letters, compiled in the nineteenth century and edited by Michael O'Flanagan in 1930, record a local tradition that the church served as the chapel of the nearby castle, a common enough arrangement in late medieval Ireland, where a lord's household would have its own place of worship close at hand. The south wall shows a large breach that may once have been a doorway, and a single-light window with chamfered jambs. What has vanished entirely is the graveyard, marked on the first edition Ordnance Survey six-inch map to the south of the church but absent from the 1905 edition. Its disappearance above ground did not mean it fell entirely out of use. Both O'Meagher, writing in 1890, and Stout, writing in 1984, record that the ground continued to be used for the burial of stillborn children long after it was officially disused. These informal burial places, sometimes called cillíní, occupy a particular and quietly sorrowful place in Irish rural practice, used for unbaptised infants who were considered ineligible for consecrated ground under Catholic church law. That the graveyard at Clonbuogh served this purpose, even as it faded from official maps, gives the site a layered history that the remaining stonework alone does not fully convey.