The choir arch has been defaced beyond easy reading, and the choir itself, which once extended the building eastward, has almost entirely vanished. What survives is the nave, roughly 10.6 metres by 5.4 metres, along with a plain south window that narrows noticeably from inside to out, and a disfigured south doorway. On the low hill immediately beside the church there is also a caher, a dry-stone or earthen enclosure of early medieval type, accompanied by associated earthworks.

The documentary record for this site stretches back to 1253, when the church was restored by the priory of Athissell, an Augustinian house in County Tipperary that held influence across a wide stretch of Munster. By 1291 it appears in records as Kylbraderan, and by 1410 it had been formally dedicated to St Brendan the Abbot, though locally the saint's name was recorded as Bradan or Bradran rather than the more familiar Brandan. A vicar named David Nangill is recorded in 1551, the same year the property was leased to a B. Cusack. By 1615 the building was already noted as out of repair, and a 1633 reference confirms continued decline. The historian Thomas Johnson Westropp, writing in 1904 to 1905, noted the fabric as he found it and drew on an 1840 Ordnance Survey letter by a correspondent named O'Keeffe, which provides unusually precise measurements and a careful description of the stonework.

The church sits within a graveyard that was still actively used at the time of recording and may well remain so. The surviving nave walls, built from large uncut stones laid irregularly, give a sense of the building's original solidity even in ruin. The pointed choir arch, once the visual and liturgical threshold between nave and choir, has been defaced to the point where its form can only be inferred. Visitors interested in the wider site should look towards the low hill adjacent to the church, where the caher and earthworks represent a separate but neighbouring layer of occupation. The site received aerial photographic coverage in March 2006 as part of the Archaeological Survey of Ireland.