Former Plas power Colliery Workshops

The workshops form an exceptionally long and thin single-storey building, roughly 55m by 10m. It is constructed of roughly coursed sandstone with a corrugated gabled roof. Tall windows on the long elevations are irregularly spaced, but represent roughly 22 bays. Most have round-headed arches, but some have straight stone lintels. There are three square-headed openings to the SE gable. Most windows are blocked or have replacement glazing. Two red-brick chimneys are positioned at the apex of the roof in the E half of the block.

The building is divided into separate workshops along its length with stone walls and later partitions. There is a king-post timber roof.