The church walls, measuring 14.6 by 5.9 metres internally, rise to their full height in rubble construction with dressed stone corners. What makes this site particularly intriguing is the evidence of an even older church incorporated into its fabric; punch-dressed blocks, stop-chamfered doorway jambs with a pointed arch in the western gable, and other reused fragments suggest the building was repaired or rebuilt after 1622 using materials from its medieval predecessor.

The architectural details tell a story of evolving worship spaces through the centuries. Four round-headed windows with splayed openings pierce the south wall, whilst a larger blocked window occupies the east gable, and two more blocked openings can be traced in the north wall. Inside, against the north wall, the Office of Public Works has erected an ancient high cross on a plinth, preserving this important piece of early Christian art. The remnants of an 18th-century memorial to the Olphert family, once an elaborate aedicule dating from 1754, now lie broken; its columns and moulded frame pieces have been cemented to the window sills.

The surrounding graveyard holds its own archaeological treasures, including a mysterious basin stone measuring 80 by 85 centimetres with a carved depression 64 centimetres across, located eight metres west of the church. In the northeast corner of the graveyard stands an imposing standing stone, over two metres tall and more than a metre wide at its base. Local tradition, recorded by the antiquarian John O’Donovan, identifies this atmospheric site as Rath Finan, possibly an early ecclesiastical settlement that predates even the medieval church whose fragments were built into the 17th-century structure.