The redevelopment work for Renfrewshire Council will allow the 19th-century town hall to host a broader range of events as well as improving the performance facilities.
The project includes new catering and conference facilities, better physical access, and improved mechanical and electrical systems.
Advance works are taking place on the site at present and Kier will start work on the main construction phase from January 2020.
Brian McQuade, managing director of Kier Regional Building Scotland, said: “We are pleased to work with Renfrewshire Council, operators Renfrewshire Leisure and hub West Scotland as we help to protect and transform Paisley Town Hall into a modern, vibrant venue.
“Work is due to be completed by the end of 2021. As well as transforming Paisley Town Hall into a top-class destination, we will be creating local jobs for local people together with valuable learning and training opportunities.”
Kier has several heritage projects in Scotland including the refurbishment of the Burrell Museum and has just successfully completed the technically complex redevelopment of Scotland’s oldest concert venue, Aberdeen Music Hall.