A cashel is a type of early medieval stone ringfort, its circular or oval boundary wall built to define and protect the space within, and it is inside one such enclosure at Coskeam that this hut site survives. The structure measures roughly 3.4 metres along its longest axis, running north-north-east to south-south-west, and about 2 metres across. What remains is a collapsed wall with occasional facing-stones still visible, enough to read the outline of a dwelling that once stood here.

What makes the site quietly interesting is not just the hut itself but the cluster of remains around it. A second hut site lies only 2 metres to the south-east, suggesting that the cashel interior was once a lived-in space, perhaps shared between two small households or used across different periods. A cairn, a deliberate mound of stones, sits 3 metres to the south-south-east, and there is a possibility that it conceals a third hut site beneath it. That uncertainty is itself telling: the archaeology of the place has not yet fully given up what it holds. The relationship between these features, the enclosing cashel wall, the two confirmed hut sites, and the possibly concealing cairn, points to a settlement that was more complex than its modest dimensions might first suggest.