The building is modest in scale, measuring roughly ten and a half metres east to west and just over seven metres north to south, yet its surviving stonework carries the kind of layered decision-making that repays a close look. The eastern gable retains a steeply pitched profile and a round-headed embrasure, a window opening splayed inward to draw light into the interior, with a narrow round-headed light at its centre. Flanking this window are two small wall-presses, shallow recesses built into the thickness of the wall, likely used to store liturgical vessels or books. On the southern wall, a later hand inserted a narrow lintelled window into an older, larger splayed embrasure, leaving the original opening partly visible around it, a small record of changing tastes or changing needs preserved in the fabric of the wall itself.

The church served as the parish church of Kilrone, also recorded as Kilroan, and was already a ruin by 1693, the earliest date at which its dereliction is documented, according to Brunicardi writing in 1913. The remains are difficult to date precisely, but the architectural evidence points to a medieval origin. Large gaps have opened in the northern and southern walls west of centre, and the western gable survives mainly as a door opening, its surrounding masonry considerably reduced. What stands is fragmentary enough to leave questions open, yet coherent enough to read as a building, which is part of what makes the site quietly arresting. The round-headed window forms and the wall-press arrangement are consistent with Irish Romanesque or later medieval ecclesiastical construction, though without more detailed analysis the precise period remains uncertain.