A £20m price tag has been put on plans to move Leicester City Council into new headquarters.
In 2010, the current buildings, two 1970s blocks at New Walk which house about 1,200 staff, were found to need major structural repairs.
The authority said it had now decided to use a former snooker hall as the new city hall and a shop unit as a customer service centre.
A spokesman said this would save millions in running costs.
The new customer service centre and revenues and benefits reception in York House is due to open by December.
The new city hall, at Attenborough House in Charles Street, is due to be open by Easter 2014 once alteration and repair work has been carried out.
The council said it was looking at working with potential developers to create a hub of local businesses, including some city council services, to regenerate the New Walk Centre site following demolition of the old offices.