Lawyers for the National Trust for Historic Preservation asked the U.S. Supreme Court on Tuesday to maintain a lower court order that would halt above-ground construction of a new White House ballroom. The filing follows a request by the Trump administration on August 14 for the justices to intervene and allow the project to continue. The dispute centers on whether the executive branch has the legal authority to proceed with the 90,000-square-foot project without specific congressional approval and funding.
The project was first announced by the White House on July 31, 2025, with the stated intent of creating a large event space that could accommodate more guests than the current complex allows. The National Trust for Historic Preservation, a private nonprofit, filed a lawsuit in federal court in December to stop the construction. The organization argued that the project required review by the National Capital Planning Commission and the Commission of Fine Arts, as well as formal authorization from Congress.
Senior U.S. District Judge Richard Leon issued an order pausing above-ground construction while allowing work on underground bunkers and security features to proceed. However, that order has never taken effect because the U.S. Court of Appeals for the District of Columbia Circuit issued a temporary stay. On August 7, a divided three-judge panel of that appeals court upheld Leon's ruling but granted the federal government 14 days to appeal to the Supreme Court. The administration reported on Friday that the project is currently 65% complete.
U.S. Solicitor General D. John Sauer argued in court filings that the ballroom is part of an "integrated military complex" at the East Wing that is "vitally required by national security." The government contends that Congress has already authorized the work through general laws allowing the president to make improvements to the White House and to construct buildings in national parks. Furthermore, the administration argued that the National Trust lacks standing, or the legal right to sue, because its objections are based on a "dislike" for the project rather than a concrete legal injury.
The scale of the project involves a 90,000-square-foot structure and a significant portion of the White House's East Wing. While the total dollar amount was not reported, the D.C. Circuit noted that Congress has not appropriated specific funds for the ballroom. Taxpayers and citizens would notice a permanent change to the visual landscape of the National Mall area and the White House complex. If construction continues, the administration states the structure will be "substantially finished" by November 2026, at which point the National Trust argues it will be "virtually impossible to deconstruct."
The legal precedent set by this case addresses the balance of power between the executive and legislative branches regarding federal property. It tests whether the president can use general "improvement" authorities to bypass specific congressional oversight for major new buildings. A ruling will determine whether the current 65% completion status renders the legal challenge moot or if the courts can still intervene. The National Trust has indicated it would support an expedited schedule for oral arguments in October or November 2026 to resolve the merits of the case.