A consortium comprising Aecom, HOK and Deloitte will publish a report next summer on a possible decamp for the UK Parliament.
The trio have been reappointed to support the Palace of Westminster’s restoration and renewal programme, which is examining how to overhaul the building’s fabric.
The consortium, who were previously picked for the role in December 2013, will prepare an independent options appraisal (IOA). It will be published in June or July 2015.
The report will form the basis for a decision on a preferred way forward for the Palace of Westminster’s restoration and renewal programme, expected by spring 2016.
The IOA will provide detailed information to help Parliament make a broad decision in principle on the planned programme, which has a potential 2020/21 start date.
Dr Richard Ware, programme director for Palace of Westminster restoration and renewal, said: “The building is getting older faster than we’re able to deal with it. We are bringing in the necessary expertise to advise on repairing this historic building of national importance so that it is equipped for the future.”
Alex Bell, the consortium’s programme director and a partner of Deloitte Real Estate, said: “It is clear that the UK’s most iconic national treasure is in need of significant investment and it’s been a privilege to help build a picture of understanding.
“We are delighted that further joint early stage analysis and planning will be progressed over the next 18 months in accordance with accepted best practice and drawing on all the recent mega-project successes of UK PLC.”
John Hicks, director and head of government & public sector at Aecom, said: “Other major public projects consistently demonstrate that effort put into early planning is rewarded later with better assurance around delivery. The Olympics and Crossrail are testimony to this approach. A focus on shared goals and a real spirit of collaboration between the public and private sector have also contributed to the success of the programme.”