Workshop to South West of former Crossness Pumping Station

This building is a workshop located to the southwest of the former Crossness Pumping Station, constructed between 1862 and 1865 by contractor William Webster, based on designs by Sir Joseph Bazalgette and Charles Henry Driver. It is built from yellow brick in Flemish bond, featuring red brick dressings and Portland Stone for the kneelers and buttresses. The workshop has a gabled slate roof with glazed rooflights and a rectangular plan.

Each gable end has three bays with a stone-coped gable and moulded kneelers. The main entrance consists of plank double doors set within a semi-circular arched architrave, which has raised imposts and a dog-tooth hood mould. This entrance is framed by similar blind recessed arches and flanked by recessed panels. The north wall has 12 bays with similar blind arches and square-headed recessed bays, along with two inserted 20th-century entries. The south wall features 24 bays with offset buttresses that divide recessed bays, each adorned with a similar frieze and cornices.

Inside, the workshop has a 12-bay wrought-iron roof. It is one of a pair of workshops that face the south elevation of the boiler house of Bazalgette's engine house, built during the same period.