It is catalogued simply as a house of indeterminate date, which in practice means it has been noted, mapped, and left to wait. The designation tells us it is old enough to warrant formal recognition, but not old enough, or not well-documented enough, to be pinned to a century with any confidence.

Doire Fhada Thiar is a small rural townland in Connemara, a landscape where the density of human settlement across thousands of years means that traces of habitation turn up in unexpected configurations. Houses of this kind, unassigned to a period, are more common than one might expect in such areas. They might be the remains of a pre-Famine dwelling, a seasonal shelter, or something considerably older. Without excavation or detailed survey work, the structure remains exactly what it is described as: a house, of unknown age, in a place that has clearly seen long human use. The very vagueness of the record is itself a kind of information, suggesting a building whose fabric has not yet been studied closely enough to yield a date.