UK lawmakers are facing a major decision over the future of the Palace of Westminster, as mounting safety risks and ageing infrastructure force Parliament to confront the need for extensive restoration works costing billions of pounds.
Members of both the House of Commons and the House of Lords will soon be asked to decide whether to temporarily leave the historic building so that long-delayed maintenance can finally take place. The condition of the estate has deteriorated to such an extent that senior figures warn a serious incident is only a matter of time.
Peers and former ministers have repeatedly raised concerns about the risks posed by outdated systems, crumbling stonework, asbestos, frequent fires and failing plumbing. Several have likened the situation to a disaster waiting to happen, warning that without decisive action, Parliament could face catastrophic damage.
Despite years of warnings, successive decisions have been postponed. A parliamentary report published a decade ago already cautioned that, without urgent intervention, the building could become unusable. Since then, temporary fixes have continued, but the underlying problems have worsened.
In early 2026, MPs and peers are expected to be presented with three main options. The first would involve a full decant, with both chambers relocating to alternative premises while comprehensive works are carried out. The second would see only the House of Lords move out, allowing the Commons to remain on site. The third option, described as enhanced maintenance, would involve carrying out repairs in phases while Parliament continues to operate, a process likely to take much longer.
Possible temporary locations for a relocated Parliament include the QEII Conference Centre, Richmond House in Whitehall and other nearby sites. Previous estimates suggested that a full decant could cost between £7bn and £13bn, with Parliament vacating the building for up to two decades. Partial or phased options would significantly extend the project timeline and push costs even higher.
A forthcoming report from the Renewal and Restoration Client Board is expected to provide updated figures, assess the risks associated with each option and make a recommendation. The final decision will rest with MPs and peers once the government schedules a formal vote.
Supporters of a full decant argue that it is the safest and most cost-effective solution in the long term. They point out that Parliament has already agreed in principle to leave the building once before and warn that continued delays undermine public confidence and place the historic estate in increasing danger.
Others remain deeply sceptical. Some parliamentarians fear that leaving the Palace could weaken Parliament’s authority, particularly the House of Lords, or lead to spiralling costs once contractors gain full control of the site. There are also voices questioning whether the risks have been overstated, noting that similar warnings were made years ago without any immediate catastrophe.
Newer MPs, meanwhile, are weighing the practical realities against broader responsibilities. While many acknowledge that repairing the building is not among voters’ top concerns, they also recognise a duty to protect an iconic symbol of British democracy for future generations.
Whatever option is chosen, the scale of the project means the government will have to commit vast public funds. With safety concerns intensifying and patience wearing thin, Parliament is approaching a moment that could shape not only the future of the building itself, but also how the public views its willingness to confront long-standing problems.