The well itself is roughly 2.5 metres in diameter, straight-sided, and lined with drystone walling, the technique of stacking stones without mortar that was common across early Irish ecclesiastical and secular construction alike. Around it runs a subrectangular enclosure of the same drystone method, just one course high and measuring approximately 3 metres north to south and 2.2 metres east to west.

The well sits at the north-western corner of a moated site within the grounds of Ardfry House, and its precise position within that landscape was noted by Holt in 1912, who observed that it occupies what he described as a small bastion-like expansion of the scarp, meaning it juts outward slightly from the earthen slope or defensive bank surrounding the site. A motte, the raised earthen mound characteristic of early Norman fortification, forms part of this complex, and a tower house was subsequently built on the western scarp of that motte, just a few metres to the south-east of the well. The clustering of a holy well, a motte, and a tower house in such close proximity points to the long and overlapping occupation of this ground, with sacred, defensive, and domestic functions all pressing up against one another. A number of burials were also found in the vicinity of the well, which, while not unusual near sites associated with early Christian dedications, adds another layer to the accumulated significance of the spot.