That deliberateness is, in fact, precisely what happened. The builders levelled the interior by raising the floor on the lower, western side and cutting into the upsloping bank on the east, compensating for the natural gradient so that the ground within the ten-metre circle would sit flat. It is a modest but considered piece of engineering, and it points to a structure that was meant to function, not merely to mark territory.

What survives today is the lower courses of a largely collapsed stone wall, between roughly twenty centimetres and one metre high in places, and somewhere between one and one and a half metres thick. Within that thickness, the construction reveals a particular technique: an inner and outer row of contiguous upright stone slabs, set side by side in a kind of double-faced arrangement. This method of walling, using closely set orthostats rather than simple rubble infill, is associated with early enclosures found across the southwest of Ireland, though the precise date and function of the Cousane example is not firmly established. Enclosures of this kind could have served as a farmstead boundary, an animal pen, or something with a more ceremonial purpose; the form alone does not settle the question. The wall is best preserved along the western arc, where the remaining stonework gives the clearest sense of the original construction.