Tucked against the inner face of the enclosure wall, a cluster of small buildings occupied the southeast and northeast quadrants of the fort's innermost ring, and at least one of them attracted a notably candid verdict from the archaeologist who dug them up: structure 7 was recorded as "dubious" and, more pointedly, "much the worst piece of construction within the fort."

The structures were excavated by Hugh Hencken in 1938 as part of a wider investigation of Cahercommaun, a triple-walled cashel, that is, a stone-built ringfort, whose innermost enclosure is the focus of most of the known activity. Numbered 3, 8, 9, 10, and 11 in Hencken's scheme, alongside the ill-regarded structure 7, these buildings appear to have been lean-to constructions, meaning they likely used the enclosure wall itself as one of their sides, with a simple sloping roof propped against it. Later analysis by Claire Cotter in 1999 revisited Hencken's findings and placed these structures within the broader context of how the fort's interior was organised and used. The contrast between the carefully built enclosure walls and the rough, almost apologetic quality of structure 7 is a small but telling detail, a reminder that even within a single fortified site, the standard of building could vary enormously depending on purpose, resources, or the competence of whoever was doing the work. Cahercommaun is a national monument in State care.