What survives here is a burnt mound, known in Irish archaeology as a fulacht fiadh, a type of site typically formed by the repeated heating of stones in fire and their subsequent plunging into a water-filled trough. The stones shatter with the thermal shock, and over time the discarded, heat-cracked fragments accumulate into a low, crescent-shaped mound, dark with charcoal and often found near a natural water source or boggy ground. These sites date broadly to the Bronze Age, though some are earlier or later, and they are among the most commonly recorded prehistoric monument types in Ireland.

This particular site came to light not through chance discovery but through the methodical work that precedes modern construction. A geophysical survey, carried out under Licence no. 06R0135 in 2006 by Leigh, identified an area of burnt archaeological material in advance of a proposed residential development. That initial survey was followed by test-excavation, conducted under Licence no. 06E0996, which confirmed the presence of charcoal-rich deposits containing heat-shattered stone. Significantly, the material was located to the west of a waterlogged area, a detail consistent with the pattern seen at burnt mounds elsewhere, where proximity to standing or slow-moving water was a practical necessity. The findings were recorded by Turrell in 2006.

Because the site was identified during pre-development assessment, it is unlikely to be visible or accessible as a discrete monument today. There is no indication in the available record that it was preserved in situ or marked in any way following excavation. Anyone with an interest in burnt mounds more generally would find better-preserved and more accessible examples elsewhere in Leinster, though the Balrothery site is a useful reminder that even apparently unremarkable ground on the edge of a suburban village can carry layers of activity stretching back several millennia. The record compiled by Christine Baker and uploaded to the Sites and Monuments Record in February 2015 ensures that, whatever became of the physical remains, the archaeological evidence is not entirely lost.