The enclosure itself, roughly 25 metres east to west and 24 metres north to south, is defined by drystone walls, a building technique that uses no mortar, relying entirely on carefully fitted stone, that barely reach knee height today. Two low upright stones in the north-western interior may once have served as grave markers, though the ground has long since settled over whatever lies beneath.

The oratory at the eastern end of the enclosure is the most substantial surviving structure. A researcher named Hickson, writing in 1886, proposed that this building may be identifiable with an entry in the Papal Taxation List of 1302 to 1307, where it appears under the name Eccia de Gleann-faisi, listed within the deanery of Offerba. If that identification is correct, the structure was already old enough to be assessed for ecclesiastical taxation in the early fourteenth century. The walls, built largely of rubble with dressed sandstone blocks used more carefully in the interior, had deteriorated badly before restoration work carried out by the Office of Public Works in 1984 stabilised them and revealed that they once stood considerably higher. That work also uncovered a blocked opening of unknown function in the eastern wall, and, embedded face down near the northern wall, two fragments of a decorated quernstone, a hand-operated grinding stone, placed or discarded there at some unknown point. A holed stone was also found on site, similar in type to the pivot stones seen above the doorway at the more widely known Gallarus Oratory. The west wall doorway, now missing its lintelled top, retains a draw bar socket on one side, a slot designed to hold a timber beam that would have secured the door from within, connecting to a small niche in the wall thickness. The eastern window, splayed on the interior to admit more light into the narrow space, has also lost its head but the neatly dressed stonework of the reveals survives.