The building has vanished entirely, leaving no visible trace at ground level. What remains instead is a quiet enclosure, its edges defined by a scarp faced with drystone walling, and somewhere beneath or around it, the outline of something older still.

The ecclesiastical site sits within an oval-shaped rath, a type of enclosed settlement typically formed by a raised earthen bank and associated with early medieval Ireland. The decision to plant a church inside one was not unusual in the Irish context, where early Christian communities frequently adapted pre-existing enclosures, lending them new purpose without entirely erasing their earlier character. At Castleterra, that layering of uses is still legible in the shape of the ground. The graveyard's original entrance, now fitted with a modern gate and pillars, faces east-southeast, and a modern trench runs around part of the exterior from north-northeast to east and from south-southwest. The oldest legible headstone inscription dates to 1740, though the site's religious use is almost certainly older. Two stoups of late medieval date, small stone basins used to hold holy water, survived the disappearance of the church itself and are now housed in the modern Catholic church situated roughly twenty-five metres to the east. So too is a carved stone head, probably salvaged from the original medieval building and built into the wall of its successor. Stone heads of this kind appear with some regularity in Irish ecclesiastical contexts, their origins and precise meanings debated, but their continued preservation and reuse suggesting that communities thought them worth keeping close.