Earlier this year both McAlpine and Laing O'Rourke were beaten to a West End office refurbishment from the same client by InteriorExterior. Great Portland Estates has spent more than £20 million on sites around Tooley Street over the past year in a bid to capitalise on the regeneration of the area.
The contractors are vying to build the project on the plot to the rear. Proposals are for around 160,000 sq ft of office space. Plans submitted to Southwark Borough Council in March include a 12-storey tower at the back of the site and a second office block behind the existing building.
Construction work on the two-year scheme is due to begin in early 2006.
The firm has been joined by Mowlem, Sisk and Morrison for the project in St Albans, known as The Place, for developer Henry Davidson.
Plans for the scheme, which is due to start on site next year, include a five-screen cinema, restaurants and 168 flats.
Construction work is expected to last two years.