This once stood in the northern edge of Carshalton Park which originally extended down nearer to the High Street. Very little is known about the history of the building, but its shape, large windows and south facing orientation are typical of an Orangery.
These buildings were predecessors of the modern greenhouse. Oranges and other plants were grown in large pots or wooden tubs. They were kept in the orangery over winter and set out in the garden in the summer.
In the first half of the 18th century an Italian architect called Leoni designed a palatial house for Carshalton Park but it was never completed. The project included a very large orangery but the existing building is much smaller and is unrelated to the Leoni design. It may have been built in the second half of the 18th century, possibly for George Taylor, who owned plantations in the West Indies, and probably built a new house in Carshalton Park.
By the late 19th century the Orangery was being used a stable. It is now used as offices for the Environment Agency.