On Tuesday, the White House told Reuters it intended to send plans to the National Capital Planning Commission, an agency that typically approves and monitors construction on federal buildings. Demolition began earlier this week, with reporters taking video of a backhoe ripping out chunks of the White House’s exterior.

Plans for Trump’s 90,000 sq ft ballroom were made public in the late summer, with Trump saying he would personally fund the $200m construction. “Just another way to spend my money for this construction,” he said at the time.

White House officials insist demolition is allowed without the commission’s approval. Will Scharf, the Trump-appointed head of the commission, who is also a White House staff secretary, said in September there was a difference between demolition and rebuilding work, and only the commission can approve new construction.

But in a letter sent to the White House on Tuesday, the National Trust for Historic Preservation, a leading historic preservation nonprofit created by Congress, told the White House that demolition plans were “legally required” to go through public review and urged Trump to pause demolition.