Langley Chapel has a simple rectangular plan. It is built of dressed grey sandstone with a stone-tile roof, and has a small weatherboarded bell tower at the west end.
On the exterior, the south wall has two Tudor doorways with flat arches and nail-studded doors. Inside is a variety of rather plain windows: one is square-headed, while others were perhaps remodelled from earlier medieval windows.
Characteristically Tudor decoration of roses and fleurs-de-lis appears on the plaster frieze between the roof and south wall, although the corresponding frieze opposite has been lost. Glazed and decorated medieval tiles have been reused on the chancel floor.