It is not what most people would expect to turn up in a housing development at St. Fintan's Park, Kill of the Grange, but the site sits within the zone of notification for a cluster of protected national monuments: a medieval church, a graveyard, and a bullaun stone, which is a large rock with one or more hollowed depressions, typically associated with early Christian ritual use. The prone burial, departing from the normal extended, supine position of the period, may point to punitive treatment of the individual, or perhaps to a penitential custom; the archaeology does not settle the question either way.

The excavation, carried out by Irish Archaeology Consultancy between January and late January 2018 on behalf of Elliot Group, was triggered when the Monument Protection Division of the National Monuments Service flagged a threat to the site in December 2017. The pipeline corridor ran roughly 45 metres, passing within 6 metres of the existing graveyard wall. Within that narrow wayleave, archaeologists uncovered six small pits, a shallow gully, two large ditches, the boulder core of an inner bank, and two inhumation burials. Radiocarbon dating placed the prone burial and a curving ditch in the 6th or 7th centuries, a moment described in Paul Duffy's 2019 excavation report as close to the cusp of the advent of Christianity in Ireland. The larger ditch, gully, and inner bank were dated by artefact to the 12th and 13th centuries, corresponding with documentary references to an agricultural village of the Church at Kill of the Grange. A subsequent geophysical survey commissioned by Dún Laoghaire Rathdown County Council, carried out by Joanna Leigh in 2018, detected a curvilinear series of responses matching a boundary feature of Kill Abbey as shown on historic maps, suggesting a buried wall or enclosure boundary may still lie beneath the ground surface.

The site sits within an ordinary residential neighbourhood at Kill of the Grange, and most of the archaeology remains below ground and out of sight. The graveyard and church ruin are accessible and worth locating on foot; the bullaun stone is recorded among the national monuments here, though its precise visibility on the ground may vary. The geophysical survey results hint that further ditch features associated with those excavated in 2018 may survive in the vicinity of the excavation site, meaning that what has been found so far likely represents only a fraction of the enclosure that once defined this early ecclesiastical settlement.