The walls are drystone, meaning they were built without mortar, relying entirely on the careful stacking of stone against stone, and most of them still stand to a height of around 1.25 metres and a thickness of 0.7 metres. The western wall has collapsed entirely, but the eastern wall remains sufficiently intact to show a narrow entrance, just 0.7 metres wide, positioned at its centre.

The structure measures roughly 5.2 metres east to west and 2.8 metres north to south, making it a compact space by any measure. Hut sites of this kind are relatively common across Kerry, associated broadly with early medieval or later pastoral activity, though assigning a precise date without excavation is difficult. What makes the Coolnagoppoge site slightly more notable is that it does not stand alone: a second hut site lies approximately 20 metres to the north, suggesting that this was once a small cluster of activity rather than a solitary outpost. Together, the two structures point to some kind of organised, if modest, human presence in this river valley, people who built in stone, oriented their entrance to the east, and left behind walls substantial enough to still define a space centuries later.