The walls are barely knee-high in places, slumped and partly collapsed, yet the roughly circular outline of the structure remains legible: around five metres north to south, four and a half metres east to west, with an entrance gap less than a metre wide still discernible in the western side. This is a booley hut, a temporary shelter used during booleying, the old Irish practice of moving cattle to upland pastures for the summer months and living alongside them until the season turned. The people who built and used these places were not settled here; they came with their animals when the lowland grazing was exhausted and left before the worst of the weather.

This particular hut is the most substantial and best preserved of a cluster of at least ten such structures at Cregganroe, all associated with a surrounding field system that together suggest a functioning, if temporary, agricultural settlement. The walls are uncoursed and built entirely from local, unworked stone and boulders, with larger pieces laid flat or set upright in the inner face of the basal courses, a simple technique that lent the base of the wall some stability without requiring any dressed stonework. On the eastern exterior, a small subrectangular annex is attached, sharing a wall with the main hut and subdivided into two compartments, each roughly two metres by one and a half. These spaces are far too small to have housed people, and were more likely used for storage or to shelter a young animal. The ridge rises immediately to the south of the hut and drops away steeply to the north, where a wide expanse of boggy ground stretches out below. It is a functional position: sheltered from the prevailing south by the ridge, with a clear view over the grazing land.