Most structures carry their origins in a datestone, a deed, a builder's invoice, or at the very least a style legible enough to place within a generation. House No. 15, recorded in the Dublin Environmental Inventory for the south city area, offers none of that. It sits in the record simply as a house, date uncertain, which in the language of architectural survey is a small admission of defeat.

The Dublin Environmental Inventory is a systematic survey of buildings of potential environmental and architectural interest, compiled by the Department of Architecture at University College Dublin. Its purpose is to capture structures that might otherwise slip through the net of formal protection, cataloguing everything from Georgian terraces to modest vernacular buildings that have survived more by accident than design. That House No. 15 appears in this inventory at all suggests it was considered worth noting, even if the surveyors could not settle on when it was built. The absence of a date is itself informative. Buildings that resist easy classification tend to be either very old, substantially altered over several periods, or simply underdocumented, the kind of place that changed hands without fuss and never attracted the attention of a newspaper or a civic record.

For anyone curious enough to seek it out in the south city, the practical reality is that the available information stops well short of a street address. The inventory entry, as it stands, gives little more than a number and a broad geographic area. South Dublin city covers a considerable stretch of streetscape, from the Liberties and Portobello through to Rathmines and beyond, and without further archival digging through Dublin City Council records or the Irish Architectural Archive on Merrion Square, pinning down the exact location would take some patience. The Irish Architectural Archive holds significant collections relating to Dublin's built environment and may hold survey notes or photographs that expand on what the UCD inventory records. A visit there, rather than to the building itself, might be the more productive first step.