What makes the site unusual is not any single feature but its density: at least nine separate enclosures have been identified here, occupying a tract of otherwise unremarkable agricultural land in County Tipperary.

The principal earthwork is rectangular, measuring 6.5 metres north to south and 20.4 metres east to west, and is defined by an earthen bank that retains a crest width of 1.5 metres and a base width of 2.8 metres. Though modest in height, the bank still stands at roughly half a metre on the exterior, less so internally, where centuries of agricultural activity have taken their toll. The northern side has been largely levelled, and the western edge is now obscured beneath scrub. Stone protrudes from the southern bank, hinting at some degree of original structural material beneath the earthen covering. The enclosures as a whole correspond broadly to earthworks that appear on the second edition Ordnance Survey six-inch map, surveyed and published in 1906, meaning they were already visible and mappable features by the early twentieth century, though their origins remain unspecified in the available record.

Enclosures of this kind are a common but poorly understood feature of the Irish rural landscape. They may represent anything from early medieval settlement boundaries to agricultural or stock management features of more recent centuries, and without excavation the function of any individual example is difficult to pin down. At Grangebeg, the sheer number of distinct enclosures concentrated in one field adds a layer of complexity that makes the site more than simply a solitary earthwork.