It measures roughly three metres by two, which is to say barely the footprint of a large garden shed, yet what remains of its drystone construction, walls built from dry-laid stones without mortar, still reaches close to a metre in height in places. The larger stones used in the lower courses push up visibly through the bog surface, giving the site an almost skeletal quality, as though the land is slowly digesting something it never quite managed to finish.

The entrance, facing east and just half a metre wide, is the detail that lingers. That orientation and that narrowness are typical of vernacular structures built with practicality in mind rather than comfort, shelters used seasonally by people working in upland pasture, or perhaps for animals. The rough hill pasture and boggy ground around Coomnacronia Lake would have been summer grazing territory, and structures like this one were the most modest kind of seasonal habitation. A second hut site of the same type lies roughly twenty-five metres to the south, which suggests this was not an isolated effort but part of a small cluster, two buildings close enough to have been used together, perhaps by the same household or community during the same season.