What makes this building quietly arresting is the combination of military and ecclesiastical Gothic details pressed together on a relatively modest structure: the embattled tower sits alongside a nave whose southern wall is pierced by three large pointed windows with cusped Y-tracery, a decorative stonework pattern in which the window's upper section branches into two curved bars meeting in a cusp, giving the glass an elegant, forked appearance. The whole is built in random ashlar sandstone with limestone used for the finer details, a pairing common in the period when local stone did the structural work and the softer, more workable limestone handled the carved elements.

The church was erected in 1822, as recorded by Samuel Lewis in his Topographical Dictionary of Ireland published in 1837. It sits roughly 800 metres east of the mining settlement of Dromagh, a detail that quietly locates it within a working industrial landscape rather than a purely agricultural one. The plan is rectangular, with the long axis running northeast to southwest, a vestry projecting from the east end of the north wall, and a chancel added to the east with buttressed corners. The tower occupies the western end, its door set into the south wall under a bluntly pointed arch. At some point the building passed out of religious use, leaving the architecture to age without alteration or renovation.

The graveyard surrounding the church is subrectangular, roughly 50 metres north to south and 40 metres east to west, and enclosed by trees. The headstones, which date from the mid-nineteenth century onward, are grouped to the south of the church rather than distributed evenly around it, which gives the northern half of the enclosure an open, uncluttered feel and allows a clear view of the building's north elevation. It is worth approaching from that side to take in the vestry projection and the chancel buttresses before moving around to the more decorated southern face with its tracery windows and the tower's angled corner buttresses.