The building is cruciform in plan, meaning it is laid out in the shape of a cross, with transepts projecting from the south-western end. Each transept gable holds tall pointed stained glass windows, and the main entrance at the north-eastern end is notably ornate, featuring a central breakfront, which is a section of wall that projects slightly forward from the main facade, built in coursed ashlar and topped by a bellcote. The doorway itself sits within a round-headed rebate, with a pointed window rising above it on the first floor. There is also a gallery inside the nave, suggesting a congregation that once warranted the extra capacity.

The building appears to date from the early nineteenth century, and it was already established enough to appear on the Ordnance Survey six-inch map of 1842. It continued in use as a place of worship until the early 1940s, when a replacement church was built on the main street to the south-west. Rather than fall into ruin or be demolished, the older structure was repurposed, and it retains enough of its original fabric, the stonework, the windows, the bellcote, to read clearly as the ecclesiastical building it once was. In a village the size of Glanworth, the survival of such an architecturally composed structure in active community use is quietly unusual.