Chapel of former Pen-y-fal Hospital

Snecked bull-nosed red sandstone rubble masonry with freestone bands and window dressings; tall natural slate roof with red tile cresting. Cruciform, Decorated Gothic style church with 4-bay nave, transepts, apsidal chancel and octagonal fleche at the crossing. The west front has a 5-light Geometric window over a flat roof full width porch with twin gable arched entrances with single light windows on either side; the main window has a taller central light and three quatrefoils in the head. The nave has lancets with stepped buttresses between. Four-light transept windows of similar character to that at the west end; main entrance is now to north transept and the gabled porch cuts into the base of the window above; cylindrical chimney stack to south transept. Semi octagonal east end with gables over 2-light ogee windows. Very steeply pitched roofs; the fleche has an open traceried bellcote and crocketed top.

Interior not inspected at resurvey but a scissor truss roof was reported at listing in 1992.