When road construction work on the route from the R671 into Greystones prompted an archaeological excavation in 2003, investigators uncovered the outline of a circular structure roughly eight metres across, its form preserved only as a pattern of post-holes in the ground. Post-holes are exactly what they sound like: the sunken sockets left behind when upright wooden posts decay or are removed, and they are often the only trace that survives of timber buildings from the distant past. No walls remained, no roof, no visible surface feature at all, just the negative space of what had once stood there.

Directly to the south of this circular outline, excavators found a sunken hearth and a cluster of intercutting pits. Within those pits lay a large quantity of charred cereal grains, which points to some form of agricultural processing or storage on the site. Charring can preserve organic material that would otherwise rot away entirely, and cereal deposits like these are a common indicator of domestic or small-scale farming activity. The combination of a post-built circular structure and grain storage nearby suggests a dwelling of some kind, a place where people lived, worked, and cooked. The excavation was published by Molloy in 2006, and while the report does not fix the site to a precise period, circular post-built structures with associated hearths are characteristic of Irish prehistoric settlement spanning several millennia.