The Civil Survey of 1654-6 recorded the church as being under repair at that time, suggesting it was already well-established by then. When the new Church of Ireland parish church was constructed in 1826, this ancient building finally ceased its religious function, though its stone walls remain within the surrounding graveyard that continues to serve the local community.

The church site contains several intriguing archaeological features that hint at its long sacred history. A cross-inscribed slab can be found to the southwest of the church ruins, still within the graveyard boundaries. Local historian Conaghan noted the presence of two damaged bullaun stones at the church in 1977; these distinctive bowl-shaped depressions carved into rock were typically used for grinding grain or holding holy water in early Irish Christian sites. Though these particular examples couldn't be located during later surveys, their reported presence suggests the site may have early medieval origins.

Set amidst good pasture land with the sea just a short distance to the southwest, Killaghtee's location reflects the typical siting of Irish churches; accessible to the community whilst maintaining a connection to the natural landscape. The graveyard that embraces the old church continues to be used, ensuring that this ancient religious site maintains its sacred purpose even as the centuries pass.