[2] Work started on the new building, which was designed by Charles Aslin, in the Neo-Georgian style, in 1938 and the part-built facility was then requisitioned by the Air Ministry during the Second World War.

[2] The original plan had involved an oval council chamber to the south of the main building as well as a clock tower but both these aspects of the proposals were abandoned.

[1] The design of the Mayor's Chamber incorporated oak panelling recovered from Derwent Hall before it was demolished to make way for the Ladybower Reservoir in 1942.

[1] After Derby was awarded city status on 7 June 1977,[6] the Queen presented a "charter scroll" or "letters patent" to the mayor on the steps of the Council House on 28 July 1977.

[7] An extensive refurbishment of the building, to a design by Corstorphine and Wright, and undertaken by Royal BAM Group[8] at a cost of £34 million,[9] was completed in 2015.