The corn-drying kilns at Ballygrennan came to light not through deliberate archaeological investigation but during routine monitoring of topsoil-stripping, the kind of chance encounter that reminds us how much ordinary working life from earlier centuries lies just beneath the surface of Irish farmland.

Archaeologist Emmet Byrnes excavated three of these kilns under Licence 02E0368, publishing his findings in 2004. What he found were oval, earth-dug features, ranging from 2.7 to 5.5 metres in length and between 1.2 and 2 metres wide, shallow at around 0.22 to 0.27 metres deep, and partly lined with stone flags along the sides and base. A corn-drying kiln was typically used to dry harvested grain before milling or storage, particularly important in Ireland's damp climate where grain could not reliably air-dry in the field. What made these three examples unusual was the absence of any defined flue, the channel that would normally direct heat from a fire into the drying chamber. Despite this, carbonised grains identified provisionally as bread wheat and barley were recovered from all three features, confirming they had been used for exactly that purpose. The kilns formed the third phase of activity at the site, which also preserved a medieval field system within which they sat, placing them within a broader, organised agricultural landscape. The nearby site of Uregare Church lies around 300 metres to the southwest, suggesting this area once supported a more substantial settled community than the quiet pasture there today would suggest.

Because the monument has been fully excavated, there is nothing visible above ground, and aerial images show no trace of it. The site sits in pasture immediately north of the road marking the townland boundary with Goat Island, around 90 metres northeast of the boundary with Uregare. For anyone with an interest in medieval land use in the region, the broader landscape context, including the church site to the southwest, may be worth exploring, though access to private agricultural land would require the landowner's permission.