Tower of Yr Hen Gapel, including attached wall-footings

The Tower of Yr Hen Gapel is a Grade II listed structure, consisting of rubble stone ruins from the 14th century and later, oriented roughly east-west. The remains include a truncated west tower, the east wall, and the lower sections of the side walls. The square 14th-century tower features a battered base and a fragmentary string course just below the cambered head of the west door, which is constructed with stone voussoirs. The upper storey of the tower was removed and replaced in 1879 with a plain pyramidal slate roof. A stone clockface, known as the 'eleventh hour' clock, is located on the west side and is dated 1879, with the hands frozen at five minutes to ten, displaying Roman numerals and incised spandrel panels.

The low walls of the former nave have a gap where the south door used to be. The east wall stands approximately 3 meters high and has a battered base, featuring a flat-headed two-light traceried east window with trefoiled heads. Inside the tower, there is a pointed stone vault on the ground floor. Above the doorway, there is a blocked recess that may have been a former opening, which has a slate lintel. A small pointed arched nave door with stone voussoirs leads into the nave, which was previously roofless and had whitewashed plaster. The east end of the nave has a raised slate flag floor, with a squared recess in the south wall that has a slate sill, possibly indicating a former window. Additionally, there is a small square alcove in the east wall, immediately south of the window.