The present Church of Ireland building is the product of at least three distinct phases of construction, yet it occupies ground that was already considered sacred long before any of them.

The place takes its name from St. Beagán, a figure whose name was anglicised over time to Peacon, and the medieval church dedicated to him underlies the current structure. What stands today was built in 1759, incorporating fabric from that earlier building, so the walls carry older material within them than the date alone suggests. The Board of First Fruits, a body that used revenues from ecclesiastical taxation to fund Protestant church building and repair across Ireland in the eighteenth and early nineteenth centuries, added transepts in 1819 to 1820, giving the building its cruciform plan. A projecting chancel and vestry followed on the east elevation in 1867, completing the building more or less as it now appears. Inside, a monument to Sir William King survives. The graveyard enclosure itself, a roughly square plot measuring approximately 41 metres north to south and 38 metres east to west, is bounded by rubble limestone walls that post-date 1700, entered through cut limestone gate piers and double-leaf cast-iron gates on the north side.

The site sits within the rural Limerick landscape and is accessible from the north through those cast-iron gates. The boundary walls and upstanding grave markers are worth examining slowly; the mix of rubble and dressed limestone is characteristic of the period and region. Visitors interested in the interior and the King monument would need to arrange access in advance, as the church is not routinely open. The graveyard itself, compact as it is, gives a clear sense of how the building dominates the space, centred within its enclosure with very little ground to spare on any side.