Without knowing what to look for, you might walk straight across it. It measures roughly 5.7 metres north to south and 5 metres east to west, with a gap of about 1.6 metres on its northern side that once served as an entrance. Small by most standards, and anonymous in the extreme, it is the kind of structure that archaeology records but history rarely bothers to name.

The building sits within an enclosure, the type of bounded area that in an Irish ecclesiastical context often gathered a cluster of associated structures around a central church. Whether this particular building served a domestic, agricultural, or religious purpose is not known; its date has not been established with any confidence. What can be said is that it shares its ground with the church beside it, and that the two were almost certainly connected in function if not in time. The level landscape around Kiltoome offers little in the way of natural drama, which makes the quiet persistence of these foundations all the more noticeable to anyone paying attention.