The structure measures roughly nine metres north to south and eight metres east to west, its outline preserved as a scarp, a kind of earthen step or slope that marks where a building once rose above the surrounding ground. At its western end, a hollow cuts into the ridge, and earthen banks extend outward in two directions, one running west with what appears to be an entrance gap about three metres wide, the other trailing south from the south-eastern corner, worn down in places by centuries of weather and agricultural use.

The site belongs to the broader medieval settlement at Railstown, the remnants of a community that functioned during the medieval period before being gradually abandoned. Structures like this one, sitting at the edge of a settlement rather than its centre, often served practical purposes: storage, animal housing, or enclosure. The hollow at the western end could suggest a sunken-floored building, a form not uncommon in medieval Irish vernacular construction, where the floor was dug slightly below ground level to provide insulation and stability. The earthen banks, denuded as they are, hint at a small enclosure or yard attached to the building, with the possible entrance gap suggesting deliberate, managed access rather than simple field boundaries.