That phrase, indeterminate date, carries a particular weight in the language of archaeological classification. It means the structure has been noted, mapped, and given a monument record, but that its age remains unresolved. It could be a remnant of the post-medieval period, or it could be older. The uncertainty itself is part of what makes it interesting.

Cloghastookeen is a small rural townland in Galway, and like many such places in the west of Ireland, its landscape likely holds layers of occupation compressed into unassuming earthworks, stone scatters, and roofless walls. A house recorded without a date is not necessarily a grand or dramatic structure. In Irish archaeological terms, it may be a vernacular dwelling, a seasonal shelter, or the remains of a building cleared during one of the many periods of rural displacement that marked the eighteenth and nineteenth centuries. Without further detail on the specific features of this structure, its orientation, construction method, or associated finds, the record remains an open question rather than a settled answer.