It was not an ancient monument anyone had been looking for. It came to light during routine archaeological monitoring for a waste water treatment scheme serving Rush and Lusk, the kind of infrastructure project that, in Ireland, frequently turns up the unexpected.

What the excavation revealed was modest in scale but precise in its significance. Two slot trenches, the type of narrow foundation cuts used to seat upright timber wall planks or posts, marked the eastern end of the structure. From the soil filling those trenches came sherds of carinated bowl pottery, a distinctively Neolithic form characterised by its angular, shouldered profile, and one of the earliest ceramic traditions in Ireland. A small piece of hazel charcoal recovered from the same deposit was radiocarbon dated to between 3640 and 3520 cal. BC, placing the occupation firmly in the early Neolithic period, when farming communities were first establishing themselves across the island. Some 37 metres to the west, excavators uncovered a small hearth measuring roughly 0.6 metres in diameter, and a short distance to the southwest, a pit and a scatter of postholes. Together, these features suggest a working domestic space, a building with an associated outdoor area, set on a south-facing slope with a clear aspect over the estuary below.

The site itself lies in the broader Rogerstown area between Rush and Lusk, a low-lying coastal landscape that still carries something of its older character in the reed beds and mudflats of the estuary. There is nothing to see at the surface today; the excavation was part of a monitoring programme rather than a planned open dig, and the features will have been recorded and covered over in the course of the construction works. The significance of the find is archival as much as physical, preserved in the excavation report by McQuade (2011) and in the national record. For anyone interested in early prehistoric settlement patterns along the Dublin coastline, Rogerstown estuary is worth understanding as a landscape, even if the house itself exists now only in the record.