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This engine house was erected in 1872 to extract water from the mine following the discovery of rich tin lodes. At that time it housed a 60 inch Harvey pumping engine with an unusual cast-iron lattice beam. The engine house was adapted during the mine's second period of working from 1911 when a 70 inch engine replaced the former. The house stands on George's or Sir Frederick's Engine Shaft which extends to 180 fathoms (1,080 feet).

In 1912 an elderly 70 inch pumping engine that had stood idle for many years at Wheal Johnny, west of Camborne, was squeezed into the house.

Traces of the original white limewash with which all these engine houses were once painted can still be seen.