Former annealing building of former Beaufort tinplate works

The former annealing building of the Beaufort tinplate works is an oblong structure with stone rubble walls and a slate roof, although only some of the slate remains. The north gable end features six blocked yellow brick semi-circular vents above and two smaller similar vents below each side of a tall central semi-circular arch, which has a segmental-headed opening and a cast copper-slag keystone dated 1874. There is a doorway under a brick arch on the left side and a round-headed window under a brick arch on the right side.

On the east wall, there is a series of small semi-circular brick vents below the eaves above three blocked wide semi-circular headed arches. The west wall has a wide round-headed central window with four bays on each side; to the right, there are four blocked semi-circular vents above a doorway and then three windows, while to the left, three of the former lunettes have been converted into tall round-headed windows. The south gable end is made of red brick and features a small 20th-century window to the left and a large blocked doorway to the right.

The building is not available for inspection and the roof is in poor condition. It is said to have had wooden king post trusses internally. According to Newman, the tinning bays of the W block have been rebuilt in replica form.