Plas Cadnant domestic service outbuilding and wall

Plas Cadnant is a domestic service outbuilding and wall, built in an asymmetrical two-storey design parallel to the house across a yard. The structure features random rubble walls and slate lintels, topped with a hipped roof made of large slates arranged in diminishing courses. It has two rectangular brick chimneys positioned centrally. To the left, there is a covered passage with heavy stone lintels that leads to a larger yard containing a coach-house. The windows consist of 12-pane and 16-pane fixed lights, with large openings flanking the passage; the left opening includes a ventilated feature.

Adjoining the left end is a roofless building that has a massive stone lintel over the front door, a cambered brick lintel at the rear, and a window on the end wall. At right angles to the main range is a three-unit lean-to, currently roofless, which is built against a high stone wall that forms the boundary of the yard on the southwest side. Tall iron gates situated between the lean-to and the house provide access from the track that runs past the house. The yard is enclosed to the northeast by a lower stone wall.

To the left of the passage is a washhouse or bakehouse, which is unlofted and has a storage area above the passageway, along with a brick oven or boiler base. It features a king-post roof truss. To the right of the passage is an unlofted room without external access, which is reached from the store/bakehouse and has servant's quarters above. This room contains a small fireplace on the ground floor, with a brick oven or boiler base in the corner. The first-floor servant's quarters, accessed by a separate door and internal wooden staircase, also has a small brick fireplace. The main transverse beam has been re-set at a diagonal to accommodate an enlarged window at the rear, and iron bacon hooks are attached to the beam. The room at the extreme right serves as a dairy and salting room, featuring a slate slab floor, limewashed walls, a slate bench around all sides, and a slate trough for salting bacon or skimming milk. The lean-to range against the high wall to the left has tiled and brick floors.