Bids are invited to carry out design and construction works to transform the stadium after the London 2012 Games into a multi-use venue with a 60,000 capacity for football matches, 74,000 for athletics meets and 90,000 for concerts.
West Ham and the London Borough of Newham have together set up Legacy Stadium Partnership LLP as a special purpose vehicle (SPV) for the project.
Work will include extending or replacing the roof so that it covers most of the seating, installing hospitality facilities and corporate boxes and office/retail accommodation. A warm-up track and field facility is also to be built alongside the stadium.
The successful bidder will be expected to be responsible for all aspects of design, take it through planning and supervise delivery of works on site for completion by May 2014.
This deadline will allow for a series of test events before the start of the next football season in August 2014.
The award of the contract still depends on the SPV completing a deal for the stadium with the Olympic Park Legacy Company.
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