Council procurement chiefs estimate this will rise to £180m if the deal is extended for a further 5 years, as hoped.
Local firms slammed the council for failing to learn any lessons after being left in the lurch when Connaught collapsed. One local contractor, who did not wish to be named, told Construction Enquirer: "It seems councils never learn. It is completely ignoring its disastrous experience with Connaught and putting all its eggs in one basket again.
"The real stick in the eye for local firms is that many specialists stepped in to help Norwich when it didn't know where to turn."
Interested firms have until 8 July to pre-qualify.