Innes intends to open a dialogue on the future use of the hall, described by Pevnser as 'the foremost English public building of between the wars'.
Innes said: 'The aim of the meeting is to launch a public debate. A number of financial pressures are growing on this fine city-centre building, on the council that runs it and on the area around it. These pressures will, sooner rather than later, require action.'
He added: 'The exhibition and the presentation of design concepts explore the options for a civic makeover of City Hall and the space around it, and argues that this building is more than sustainable as the heart of local government in Norwich.'
If Innes is successful, the Scandinavian-influenced 1930s building could be transformed with a 'planted' roof, turning it into the height of 'green office' design.
The presentation will take place tonight (6 June) at the Assembly House, Norwich at 6.30pm.