The site belongs to a category of monument known as a fulacht fia, the plural being fulachta fiadh, which are among the most common archaeological features found across Ireland. These were essentially outdoor cooking sites, where stones were heated in a fire and then dropped into a water-filled pit to bring it to a boil, allowing meat to be cooked without direct flame. What makes the Commons example worth attention is a particular absence: unlike most fulachta fiadh, it produced relatively few of the heat-shattered stones that typically accumulate in vast quantities at such sites, suggesting either a different pattern of use or a site that was not exploited over a long period.

The site came to light not through a dedicated archaeological survey but as a consequence of infrastructure work. Excavations were carried out by Marie Dowling and Kate Taylor under licence reference 02E0656 as part of the archaeological programme accompanying Bord Gáis Éireann's Pipeline to the West project. Within an area of roughly 189 square metres, the team identified eleven pits of varying sizes, five stake-holes, two post-holes, three spreads of burnt material, and a curvilinear feature that had been partially cut through by three of the larger pits, suggesting it predated them. The five largest pits formed a central cluster, ranging from about 1.1 to 2.46 metres wide and between 24 and 39 centimetres deep, their fills dark with charcoal and mixed stone. A further large pit to the west, measuring roughly 2.1 by 1.4 metres, contained stake-holes at its base that the excavators tentatively suggested may have supported a wicker lining or a windbreak. The only artefact recovered was a stray sherd of modern ceramic, almost certainly worked in from later disturbance, leaving the prehistoric date of the site reliant on radiocarbon analysis rather than finds.

The site is not publicly accessible in any formal sense, and there is nothing to see at ground level today; the excavation was a salvage exercise tied to pipeline construction, and the features would have been recorded and then built over or backfilled in the course of the works. For anyone interested in fulachta fiadh more generally, the National Museum of Ireland holds material from comparable sites, and many examples across Munster have been identified through the same pipeline project. The Commons site is best understood through the excavation report available via excavations.ie, where the full stratigraphic detail compiled by Denis Power is accessible to anyone curious about what a prehistoric outdoor kitchen actually looked like when reduced to its archaeology.