Not medieval, not post-medieval, not modern; just indeterminate. That single word does a quiet amount of work. It signals that whoever recorded this building could not confidently assign it to a century, let alone a decade, which places it in an interesting category of monuments that resist easy classification.

Pollnagarragh is a small townland in Galway, and like many such places in the west of Ireland it would have seen continuous, overlapping human activity across many centuries. Houses in the Irish archaeological record range from early medieval rectangular structures to the ruins of nineteenth-century cottages abandoned during or after the Famine. Without a date, this particular building could belong to almost any point along that long continuum. The absence of a period attribution sometimes reflects a lack of surviving documentary evidence, sometimes the ambiguity of the physical remains themselves, and sometimes simply the pace at which survey work moves across a landscape with a great deal to record.