REPAIRS to the troubled Clissold Leisure Centre in north London could cost £4.5 million.
The controversial £32 million scheme, which was shut due to defects in December 2003, was originally built by Gleeson but now needs another contractor to make it usable again.
Hackney Borough Council is hoping to recoup the repair bill in court after suing Gleeson, architect Hodder Associates and engineering consultant Whitbybird.
The council said: 'We don't want taxpayers to pay this bill.Whatever we spend we will be aiming to recoup.'
The original budget was £11.3 million but continuing problems have seen this almost treble.The successful bidder will carry out general works and modifications to the pool area, shower and changing facilities, sports hall, plant room, squash courts, dance studio and health and fitness suite.
Firms have until March 14 to register interest.