British Colliery Pumping Engine House

This is a sandstone engine house built in the standard 'Cornish' style, but it is better finished than many similar structures. It features the remains of a low-pitched Welsh slate roof. The building is a rectangular, three-storey tower made of coursed squared stone. Each long wall has an arched opening on every floor, complete with a cill and voussoir head, although all these openings have been blocked with brick. The north gable wall also has three openings of different sizes, with only the ground floor opening blocked. The south gable 'bob' wall includes a partly blocked doorway on the ground floor and a large arched 'bob' opening in the gable, which has two projecting iron brackets for a gallery below. Unlike many Cornish examples, there is no evidence of attached chimneys or a boiler house, and no surface remains of the shaft are visible.

Inside, the building is quite unusual as it retains some timber beams and stairs on the upper floors. There are also cast and wrought iron brackets, bolts, and plates present. However, all traces of the Cornish beam pumping engine have long been removed.