The walls themselves are roughly a metre thick and enclose a modest space measuring about seven and a half metres north to south and eleven and a half metres east to west, oriented in the traditional east-west alignment common to Christian ecclesiastical buildings. There is no visible graveyard, no enclosure, no standing stonework. The structure sits on a slight raised platform, its western edge defined by a gentle scarp in the ground, as though the builders chose, or shaped, a modest prominence for the purpose.

By the time the Ordnance Survey produced its six-inch map in 1838, the building was already recorded as "Kilchenagh in ruins", with a circular quarry pit marked immediately to the south. On later map editions, even that much had apparently been deemed insufficient to warrant marking as a surviving structure, and the location was downgraded to the symbol for a removed antiquity, renamed "Killkevna Church (site of)". The cartographic demotion is telling: surveyors in successive generations saw less and less worth recording, even as the footings continued to exist quietly in the grass. The quarry associated with the site is substantial, running roughly thirty-five to forty metres in one direction and about twenty metres in the other, to a depth of around a metre and a half. At its south-eastern edge are the remnants of what may be a limekiln, a small stone furnace used to burn limestone and produce quicklime for agricultural or building use, and at the north-western edge stands the ruin of a small stone shed. Further patches of quarrying are visible a few metres north and north-east of the church itself, suggesting that the ridge was worked for its stone over a considerable period, possibly drawing on the same material used to raise the church in the first place.

The site sits in open pasture, and the ridge location means the wall footings are best read from a slight distance, where the low rectangular outline and its raised platform become more legible against the surrounding ground. The westward views that the position commands give some sense of why this particular rise was chosen, even if the building that once stood here has long since been reduced to a suggestion in the turf.