The Keynsham Regeneration Project involves the £33m redevelopment of the existing council offices site in the town.
Under the two stage design and build project the successful contractor will build retail units, library and new council offices.
The redevelopment aims to revitalise Keynsham and make better use of the High Street, and will ultimately encourage wider private sector investment into the town.
The regeneration forms part of the council’s plans to reduce the amount of office space it uses and become even more financially efficient.
Its office use will reduce from 12 to just four with buildings also at The Hollies, Midsomer Norton and Lewis House and Northgate House in Bath.
Reduced running costs will deliver 10% annual savings that will benefit the local taxpayer public purse. The Council carbon footprint specifically in its buildings will reduce by up to 70%.
The formal invitation to express an interest in the project will go out on 22 August.
After that date firms can register to prequalify at http://www.supplyingthesouthwest.org.uk/