The structure at Gleann Oirtheach is classified as a hut site, the term used for the surviving earthwork remains of a simple prehistoric or early medieval dwelling, typically a low bank of earth and stone that once supported a lightweight roof of timber, turf, or thatch. What survives here measures just 2.1 metres north to south, defined by a curving bank roughly a metre wide and half a metre high. The straight southern side, which gives the whole thing its present D-shape, appears to be the result of a later stone field wall being built directly over the original bank, cutting across it and obscuring whatever curve was once there.

The site rests against the northern stone field boundary of a gently sloping, north-facing field, positioned so that it looks out across the water of Roaringwater Bay. Much of the bank is buried under long grass, and the general heaviness of the vegetation makes it difficult to read the structure clearly at ground level. The southern field wall, a later addition in geological and agricultural time, has effectively rewritten part of the monument's outline, so that distinguishing the original hut bank from the more recent boundary requires careful attention to the slight changes in alignment and material. It is a small site, and an easy one to miss, but the layering of different periods of land use in such a compact space is quietly telling about how the same ground gets put to new purposes across centuries.