It measures just 4.8 metres wide and 13.7 metres long internally, yet it retains opposing doorways, ogee-headed windows, aumbries set into the chancel walls, and a piscina, a shallow stone basin used for draining water after the rinsing of communion vessels, at the east end of the south wall. One of the nave windows has a modern central mullion replacing a lost original, but the double-light, cusped form is otherwise intact. The south doorway still has its draw-bar slots, the kind of detail that conjures something of daily use rather than ruin.

The church was the chapel serving tenants of the grange farm attached to the Priory of All Hallows, an Augustinian house founded in medieval Dublin on the site now occupied by Trinity College. A grange, in this monastic context, was an outlying farm managed by the priory to supply it with provisions, and the small chapel served the lay workers who lived and laboured there. The building is constructed from uncoursed limestone with dressed limestone quoins at the corners, and its steeply pitched gables give it a profile typical of later medieval Irish ecclesiastical work. Excavations in 1986 uncovered burials inside the building and sherds of thirteenth-century pottery, pointing to a long period of use. A second phase of investigation in 1999 added a different layer of complexity: to the east, archaeologists found a small stone water-house dated to the mid to late seventeenth century, built to regulate water flow into a series of fishponds that are marked on the 1843 Ordnance Survey map. A stone drain ran through the entire site, and domestic refuse pits at the western end suggested the pond complex had once extended that far.

The church is a National Monument in state care, listed as No. 605 and subject to a preservation order. The surrounding land has been landscaped, and no trace of the graveyard that once accompanied the church remains visible above ground. Approaching from the housing estate, the transition from footpath to green belt is slightly disorienting, which adds something to the experience of finding the building. The ogee-headed window in the chancel has been partially restored using sandstone, a visibly different material from the original limestone, and a blocked opening in the south chancel wall is worth looking for once inside. The interior, though roofless, gives a clear sense of the original spatial arrangement, nave and chancel undivided, with the liturgical fittings still readable in stone.