The floor, a shallow depression measuring just 4.50 metres by 3.20 metres, was not found standing or even ruined in any conventional sense. It survived as a flattened patch of clay, oxidised bright orange-red and burnt black in places, with a spread of charcoal and a granite slab at its centre, the whole thing sealed under centuries of accumulated soil until excavation brought it back into view.

The house was recorded by Breen in 2012 as Structure D, uncovered in Trench T11 during work at Carrickmines Castle, a site with the National Monuments reference DU026-005001. The building had gone through at least three phases of use, though the archaeology resisted neat division between them. It was constructed on a levelled platform of re-deposited clay and gravel, laid over an earlier filled-in ditch, and flanked by drainage gullies on the northwest and southeast sides. The absence of nails and the relatively modest number of postholes suggest the walls were not timber-framed in any substantial way; mud and stone construction with a thatched roof is considered more likely, with wattle partitioning separating the interior into at least two rooms. The hearth at the centre was a basic arrangement: a large square granite slab, roughly 0.45 metres by 0.40 metres, beside a small fire pit, with a re-used millstone fragment placed nearby, probably as a stand for cooking vessels. The millstone fragment is a quiet detail, suggesting that by the time the house was in use, the stone had already had a previous life elsewhere on the site or beyond it. A dense concentration of medieval pottery was recovered from the layer directly above the structure.

The site lies within the area affected by the controversial Carrickmines Castle excavations of the late 1990s and early 2000s, which were connected to the routing of the M50 motorway and generated considerable public debate in Ireland about development and archaeological preservation. The house itself is no longer accessible in any physical sense; it was an archaeological context rather than a standing structure, and the excavation record held at the National Monuments Service is the primary means of engaging with it. Researchers with an interest in medieval domestic architecture in the Dublin region will find Breen's 2012 publication the most detailed account, particularly for those interested in how ordinary households within or adjacent to a castle enclosure were actually constructed and used day to day.