Supreme Court clears Trump to keep building $400 million White House ballroom in 5-4 ruling
WASHINGTON — A divided U.S. Supreme Court on Monday allowed President Donald Trump's administration to continue construction of his $400 million White House ballroom, blocking lower-court restrictions that would have stopped most above-ground work while a historic preservation group's legal challenge proceeds. The 5-4 decision gives Trump an immediate victory in his drive to transform the White House complex, but the justices did not resolve the central constitutional question hanging over the project: whether a president can undertake a construction project of this scale on federal property without specific authorization from Congress.
Five of the court's six conservative justices backed the administration, concluding that the National Trust for Historic Preservation was unlikely to have the legal standing necessary to obtain an injunction against construction. The majority also credited the government's argument that stopping the integrated project could cause irreparable harm because the ballroom is being built alongside extensive underground security infrastructure. The decision therefore allows construction to continue while the underlying litigation moves forward rather than delivering a definitive ruling that the ballroom itself is lawful.
The surprise came from Chief Justice John Roberts, who joined Justices Sonia Sotomayor, Elena Kagan and Ketanji Brown Jackson in dissent. Roberts wrote that the ballroom's construction was “likely unlawful,” pointing to Congress's constitutional authority over the District of Columbia and federal property and to laws restricting construction on federal parkland without congressional authorization. The ballroom is being erected on President's Park, federal property encompassing the White House grounds.
Roberts said Congress had not enacted anything resembling the “express authority” needed for construction of the ballroom and warned that allowing the project to proceed was no victory for the constitutional separation of powers. His position is particularly notable because Roberts had issued an administrative stay on August 21 that temporarily kept construction moving while the full Supreme Court considered the administration's emergency application. Monday's ruling replaces that temporary intervention with a broader stay supported by five other conservative justices — without Roberts himself joining them.
The legal confrontation began after the administration demolished the White House's historic East Wing in October 2025 to make room for a roughly 90,000-square-foot ballroom. The National Trust sued in December, arguing that Trump could not fundamentally reshape the White House complex without congressional authorization and required federal reviews. U.S. District Judge Richard Leon subsequently restricted most above-ground construction while allowing underground security-related work to continue, and the D.C. Circuit upheld that approach in a 2-1 ruling earlier this month.
The appeals court's reasoning was sweeping. It said the Constitution assigns Congress — rather than the executive branch acting alone — responsibility for determining whether major physical changes to the White House may proceed and concluded that the administration had not demonstrated that Congress delegated unrestricted authority to dramatically redesign the complex. The court stressed that its ruling was not a judgment on whether a ballroom was desirable, but on who has legal authority to authorize it.
The Trump administration has countered that Congress already granted presidents sufficient authority to alter and improve the White House and construct facilities on federal property. It has also increasingly framed the development as an integrated national-security project, telling the Supreme Court that the structure extends five stories underground and incorporates bomb shelters, medical facilities, hardened construction, protected military spaces and defenses against drones, missiles and other threats. Government lawyers argued that stopping the ballroom above ground while continuing the underground complex would create engineering, security and financial problems.
Trump has said the ballroom itself is being financed with approximately $400 million in private donations, rather than taxpayer money, and has promoted it as a major new venue for state dinners and other large events. But the legal dispute extends beyond who pays for construction. The lower courts have focused on whether private financing can bypass Congress's authority over federal property and the White House grounds — a separation-of-powers issue that Monday's Supreme Court decision leaves unresolved.
Time has become an important part of the legal battle. Justice Department lawyers told the Supreme Court earlier this month that the overall project was already approximately 65% complete, with a 250-person construction crew working 20 hours a day, seven days a week. The National Trust accused the administration of attempting to “outrun judicial review,” arguing that continued construction could make the dispute effectively irreversible before courts finally determine whether the president had authority to begin the project.
That creates an unusual legal reality after Monday's ruling. The Supreme Court has allowed construction to continue because the preservation group may lack standing and because the administration asserted significant harm from stopping work, while Roberts and the lower courts have simultaneously raised serious doubts about whether the project was lawfully authorized in the first place. With construction proceeding rapidly, substantial portions could therefore be completed before the judiciary definitively resolves the underlying separation-of-powers dispute.