Grade I listed waste-water pumping station/sewage pump house built in 1865 by Sir Joseph Bazalgette, engineer of the original London sewerage system. Contains four of the largest rotative beam engines in the world and amazing Victorian decorative ironwork, including a central octagonal light well, which is made up of eight screens and has been repainted in original colours. The beams are on the upper floor and the 9ft diameter pumps are in the basement. Elegant wrought iron stairways, balconies, perforated cast iron floor in semi-circular pattern on upper floor. Impressive pediments of the Corinthian order. Original oak entrance doors at end of the engine house. One end of the engine house is being restored; the other end is conserved in its derelict state. Outside the upper windows are topped by capitals - one of which depicts Sir Joseph Bazalgette – and a decorative frieze. Victorian garden on the terrace to the south of the boilerhouse. The location stands in a fenced off area, with adequate parking for cars, coaches, lorries and vans.