A nineteenth-century survey recorded this small County Kildare church as a ruin already pressed into service as a cowhouse, a fate common enough among Ireland's abandoned medieval buildings, yet few such structures contain quite so much layered detail within so compact a footprint. The rectangular limestone building, roughly 8.6 metres long and 4.9 metres wide, sits on what may have been an early monastic site, and it gave the parish of Kilmacredock its name. Today it is ringed by a wooden fence and, stranger still, a row of palm trees planted barely a metre from the walls.

The building itself is a palimpsest of successive interventions. The walls are of small, roughly coursed limestone blocks with undressed quoins, a style of corner-stone work left uncut and unfinished, and a small bellcote survives on the west gable. Two doorways pierce the south and north walls opposite each other; the southern one has externally rebated jambs suggesting a vanished porch once stood outside, while the northern one was blocked up at some point and still carries a barring-slot hole, a recess cut to receive a timber bar that would have secured the door from within. The windows, partially robbed of their dressed stone, sit in broadly splaying embrasures, and one in the north wall and the blocked window in the east gable both carry Gothic-style arches that look to be later additions. At the east end of the south wall there is a triangular-headed piscine, a small stone basin used for rinsing liturgical vessels, which survives in notably good condition given everything else that has been altered or stripped away. The internal faces of both gable walls are offset to carry a loft, lit by a small loop in the west gable, and putlock holes, the square sockets left by the horizontal timbers of a scaffold or loft frame, are visible in both gables. Beneath all of this, occupying the entire interior below ground level, lies a large brick-built barrel-vaulted burial vault. Writing in 1896, Fitzgerald attributed it to the Bellingham family and suggested that its insertion was likely responsible for many of the alterations visible in the fabric above.