The spokesperson said: "We have the capacity to bid. We are definitely in the market."
Market sources had said Skanska was reassessing bids for schemes such as the £150m PFI for the Sherwood Forest NHS trust in Nottinghamshire.
Skanska and investment firm Innisfree are expected to be announced preferred bidder for Bart's Hospital and the Royal London Hospital next week. They beat a bid from a team led by French firm Bouygues.
Redevelopment plans for Bart's have been drawn up by architect HOK International. Alsop Architects will be urban designer for the Royal London site in Whitechapel.