Engine House at Sw70234698

The engine house at Wheal Ellen Mine, located in St Agnes, is a disused pumping beam engine house dating from the mid-19th century. It is constructed from granite and slate killas rubble with granite dressings, while the upper part of the chimney is made of brick. The structure features brick arches and timber lintels. The engine house has a rectangular plan and includes a round chimney that clasps the rear left-hand corner.

It stands three storeys high over a basement, with unaltered elevations, though the rear gable has collapsed and the front upper corners of the wing walls have been demolished. The front wall, known as the bob wall, has a central round-headed doorway. The rear gable end wall previously featured a large round-headed cylinder doorway and a window opening on each floor above. The right-hand wall has two ground floor openings, a central round-headed window on the first floor, and another opening slightly above and to the right of the windows. The left-hand wall includes a small doorway on the right and a small opening on each of the upper floors. The tapered chimney is topped with a brick collar and has brick battlements over a brick cornice. The interior of the building does not contain any machinery.