Maintaining the remains of Grenfell Tower and creating a memorial on the site is set to cost the taxpayer more than £340million.
The figure was contained in government documents seen by the Grenfell Next of Kin group.
The huge bill — earmarked by the Department for Levelling Up, Housing and Communities — emerged on the eve of the publication of an official report into the 2017 fire, which killed more than 72 people.
Sir Martin Moore-Bick, chairman of the Grenfell Tower Inquiry, is expected to criticise previous Conservative governments, Kensington and Chelsea London Borough Council and cladding and construction companies over the disaster. His report is due on Wednesday.
Grieving families have accused the £170 million seven-year public inquiry, of delaying justice by preventing prosecutions until its findings are complete.
Imran Khan KC, who represented victims at the inquiry, has said that it had simply ‘retraumatised’ his clients.
Experts predict that any legal action will not take place before 2027, a decade after the fire.