The chapel is modest in its dimensions, measuring roughly seven and a half metres east to west and five and a half metres north to south, and its surviving fabric tells a quiet story of selective collapse. The east and west walls still stand to a maximum of three metres, the north wall survives only as a low base, and the south wall has come down altogether into a spread of rubble less than a metre high.

What remains of the architectural detail is spare but telling. The west doorway is round-arched and built of uncut stone, a form more commonly associated with Romanesque or early medieval building traditions, though its precise date here is not established. By contrast, the east window is rectangular and assembled from four dressed limestone pieces, suggesting a later or at least differently sourced intervention. The building served as an estate chapel for Killiane Castle, functioning as a private place of worship attached to the castle household rather than a parish church, which may explain why there is no evidence of an enclosure or any burials on the site. Roughly forty-five metres to the south-west lies the site of St Helen's Well, a holy well, meaning a spring or water source associated with a named saint and often the focus of local devotional practice, which hints at a longer religious geography in this particular corner of County Wexford.