Coach-house and adjoining Entrance Arch to Plas Brondanw Gardens

The coach-house and adjoining entrance arch to Plas Brondanw Gardens is an L-shaped structure built from rubble, dating from the 19th century. It features a steeply-pitched roof covered with graded small slates and a tiled ridge, along with feathered eaves. At the center of the main block, there is a two-stage wooden cupola; the lower half is boarded and has lozenge-glazed rectangular panels and painted clock faces, while the upper stage is an octagonal open arched lantern topped with a sloped copper roof and a ball finial.

On the southeast side, which faces the lane, the main section has two round-arched entrances with deeply-recessed boarded double doors. The garden side includes an arched entrance with steps leading up to a recessed, part-glazed door, accompanied by a tall, 10-pane window to the left. The southwest gable features a tall arched loading bay with boarded oak doors and a reconstituted stone cartouche of a CWE eagle, representing Clough Williams-Ellis, above it, along with a 9-pane recessed window to the left.

The subsidiary section of the building is lower and overlaps the northeast gable of the main block, forming a gabled cross-wing that projects towards the lane. It has a round-arched entrance on its lane-facing gable, with a cement-stone lion mask above, and a small square light to the right. The long northeast side features a deeply-recessed oak boarded door leading to a round-arched entrance, with an 8-pane casement window to the right and a wide, plain opening with boarded double doors beyond.

The upper gable of the main block is slated and feathered onto the northeast pitch of the lower wing's roof, which contains a segmental window with intersecting tracery. Adjoining the lower wing's front, there is a high rubble wall that conceals the right roof pitch of the advanced wing and continues to the right to form an arch, complete with a projecting rubble keystone and plain riveted iron gates with a shaped top. The interior of the building is plain.