A large subrectangular enclosure, roughly 90 metres along its north-south axis and 40 metres across, wraps around the church site, and for most of its history it went largely unnoticed at ground level. It took aerial reconnaissance, carried out in July 1917, to reveal the full shape of it, the kind of enclosure that in Irish early medieval contexts typically marked out a consecrated or otherwise significant precinct, setting it apart from the surrounding landscape with a boundary that was both practical and symbolic.

What survives on the ground is partial but legible. Along the northern and eastern sides, an earthen scarp, rising to about a metre at its highest, still traces the line of the old boundary, and beyond it there are traces of an external fosse, a defensive or demarcating ditch that would originally have reinforced the enclosure's edge. Two drainage trenches have been cut into the fosse at the north-east and north, suggesting later agricultural interference with the original feature, and the north-west corner has been further obscured by tillage ridges, the low parallel banks left by historical ridge-and-furrow cultivation. The church itself sits in the northern half of the enclosure. No other internal structures are visible from the ground, though aerial photography has picked up indistinct cropmarks immediately to the north-west, the kind of faint soil discolouration that can hint at buried features such as pits, walls, or earlier structures whose physical traces have long since disappeared beneath the surface.