The Chapel Outbuildings and Yard Walls at North End of Rock Hall

The Chapel outbuildings and yard walls at the north end of Rock Hall are medieval structures that were altered in the early 19th century. They are built from rubble with cut dressings and feature a Welsh slate roof. The Chapel itself is a rectangular building oriented east-west. Its west end is integrated into a wall that extends north from the north-west corner of the Hall, connecting to the south end of the garden wall. A second wall runs east from the north-east corner of the Chapel and then returns south to join the north-east corner of the Hall, creating an irregularly shaped yard.

The south wall of the Chapel has a blocked doorway with a two-centred chamfered arch, along with two 2-light mullioned windows to the right and a 20th-century window above. The gable ends are coped, and there is a truncated stack near the left end of the ridge. The right side of the building is a 19th-century rebuild featuring a wide pointed window. The rear elevation, which is part of a later outbuilding, displays another 2-light window. A short section of crenellated wall to the south connects to the north-west wing of the Hall. A longer section of wall to the north has a blocked opening with a timber lintel. The wall to the east, which has a chamfered doorway, is 0.9 metres thick and likely medieval, while the thinner section that returns south may be early 19th century. This part includes a canted projection with a three-light mullioned-and-transomed window.

Inside the Chapel, there are remnants of a large blocked segmental-arched fireplace, which includes two brick-lined ovens in the blocking. It is unclear if the Chapel ever served a religious purpose; in the 17th century, it appears to have functioned as a detached kitchen. The canted projection resembles the early 19th-century extensions designed by Dobson at the south end of the Hall and may have been constructed during that time in its current ruined state.