The scheme will boost Fulham’s capacity by more than 4,000 to 30,000 with extra seats in the stand which backs onto the River Thames.
Sources close to the club told the Enquirer: “The contract race had come down to a final shoot-out between Buckingham and Laing O’Rourke and it looks like Buckingham has won out.”
Fulham were granted planning permission for the scheme last summer and WSP are on board as structural consultant.
A start date is yet to be set for construction but Fulham will continue to play at Craven Cottage while work is carried out.