They had come under fire after it was revealed that the cost of Portcullis House, which is on Bridge Street, directly opposite Big Ben, had spiralled to pounds 250m. At the topping-out ceremony, Sir Sydney Chapman, the chairman of the Accommodation and Works Committee, which oversees the building work, said that figure had been revised, and the project would ultimately cost pounds 15m less than that worst case scenario. Up to 201 MPs will be able to move into their new offices after next year's summer recess - ahead of schedule, Sir Sydney added.
"Few today would suggest that the money spent on the Palace of Westminster 150 years ago was a poor investment, even though the building cost three times more than the original budget," he said.
Portcullis House, which was recently dismissed by the Evening Standard newspaper as "London's latest architectural fiasco", will cost pounds 70m more than planned. The construction team's original pounds 165m estimate failed to anticipate inflation and spiralling fees.
The rooms in the building are divided up by solid concrete partitions and there are several committee rooms and restaurants. MPs will be able to relax in a leafy courtyard, which may even feature a fountain, although MPs deny that they are planning any unnecessary extravaganza. "We must be the only Parliament in the developed world which does not accommodate its MPs," Sir Sydney said. Perched above the new Westminster Jubilee Line station, the building will also house four shops that MPs hope to rent out.
MPs travelled to Berlin to compare plans for the Reichstag with those for Portcullis House.
David Chidgey, a Liberal Democrat member of the committee, said: "The German government has spent pounds 1bn on the Reichstag. Compared with the extra facilities they needed, such as the chamber ... they spent roughly the same as us. So it is unfair to suggest that we are wasting taxpayers' money."