Last week's meeting adopted the strategic case for the project. The catalyst remained the need to resolve council workplace issues in which staff have shifted to temporary office premises outside the civic block since toxic black mould was discovered.
The cheapest option to redevelop existing buildings will be canvassed together with more expensive and far-reaching options such as a new museum, expanding Baycourt, a city square, a conference centre and hotel, parking, and retail and hospitality businesses.
Mr Crosby said that planning would encompass all the civic block including Baycourt and council-owned land used as carparks on the other side of Durham St.
The other main catalysts for the planning study were co-locating council staff with others from the public and private sectors, and the future shape of the central library.
The review was being driven by issues of weather tightness and seismic strength of buildings and their ability to provide a fit-for-purpose working environment.
The council has spent $85,000 on the project with the "expensive part" coming up with the reports from Warren and Mahoney and an economist.
Cr Steve Morris said they could have a portacom or a palace, depending on the outcome of next year's election.
Community engagement on the project would start this month, with the timeline for a decision early next year.
What is needed:
Benefits fundamental to the success of civic upgrade project:
* Contributes to an active and vibrant central city
* Provides efficient and effective service delivery
* Contributes to local and regional economic development
