Billiard Room at Llanerchaeron (Previously listed as sited at Llanaeron House)

The Billiard Room at Llanerchaeron, previously listed as situated at Llanaeron House, is a Grade II* building. It features rubble construction and a slate hipped roof with wide plastered eaves, topped by a large rectangular timber lantern that has a low pitched hipped roof. There is a brick chimney stack at the rear. The building has a square plan and is a single storey with a symmetrical three-bay front.

The central gabled porch has projecting eaves and a round arched entryway with stone voussoirs. It includes a six-panel door with a fanlight that has radiating glazing, accessed by two slate steps. The outer windows are set in full-height round arched recesses and consist of round arched 10/6 hornless sash windows with radiating upper glazing bars. These windows are framed with stone voussoirs and slate sills. The lantern features fixed six-pane windows—four on the sides and two at each end—divided by pilasters that are paired towards each corner. The eaves are flat boarded, while the sides and rear of the building are plain.

Inside, the room has a coved plaster ceiling, a timber floor, and a white marble fireplace.