The architects named on the stone are J and G. R. Pain, brothers who were among the more prolific Gothic Revival practitioners working in Munster during the early nineteenth century. That the inscription was even necessary hints at a restless building history: the church had originally been erected in 1801 under the patronage of the Countess of Kingston, then rebuilt twice more before 1805, enlarged again in 1830 when the ribbed spire was added, and substantially improved once more in the early twentieth century. Few parish churches of this size carry such a compressed record of rebuilding within so short a span.

The fabric of the building reflects those successive campaigns. The nave runs on a north-south axis and is lit by four wide pointed windows on each side wall, with slender buttresses between them on the exterior. Transepts at the southern end carry corner buttresses and pinnacles above the gables, though they now serve as store rooms and vestry rather than liturgical space. Further gabled projections at the northern end of the nave give the overall floor plan an H-shape, an unusual arrangement that results from the building's incremental growth rather than any single coherent design. The entrance front faces north onto George Street, dominated by a two-storey embattled tower from which the ribbed spire rises, flanked by corner pinnacles. The materials shift across the building: coursed ashlar on the entrance front, random-rubble limestone elsewhere, with some reused ashlar in the chancel at the southern end, suggesting stonework salvaged from earlier phases of construction. Behind the church, a rectangular graveyard stretching roughly 155 metres north to south is enclosed by a stone wall, with headstones ranging from the nineteenth century to the present, alongside a number of chest tombs and vaults.