It is a quietly jarring detail at a site where centuries of use and neglect have layered on top of one another: rubble heaped against the interior of the north wall, rubbish piled against its outer face, ivy partly obscuring what stonework remains. By 1615, when a Royal Visitation recorded the place, both the church and its chancel were already described as 'downe', meaning the building had been in ruin for some time before the seventeenth century was well underway.

The church sits on a natural hillock in gently rolling terrain, constructed from roughly coursed blocks of sandstone and limestone rubble. Its internal dimensions, roughly 6.7 metres north to south and 16.4 metres east to west, suggest a modest but not insignificant structure, and a surviving fragment of a door jamb points to a fifteenth-century date for at least part of the build. Of the four walls, only the north still stands to any real height; the south and east are largely collapsed into rubble. A recumbent slab near the centre of the south wall may mark the original entrance, though its position slightly east of centre raises some doubt. At the west end of that same wall, a grass-covered bank is all that remains of what was probably an external porch. The Ordnance Survey Letters, compiled in the nineteenth century as part of a systematic effort to document Irish placenames and local antiquities, recorded a sacristy at the north-east corner of the church, with its north wall partly surviving and measuring roughly 7.2 metres by 3.85 metres, though that feature is no longer clearly visible. The graveyard to the south is enclosed within a later hexagonal stone wall, itself sitting inside an earlier earthen bank that survives most clearly to the south-west, west, and north-east. To the north of the church, outside the stone enclosure, a ramp roughly 30 metres long and 6 metres wide runs up toward the site, and may represent an earlier approach or entrance feature. The townland name itself has been interpreted as the Rath of St Mobheog, suggesting the site has ecclesiastical associations stretching back well before the surviving medieval fabric.