WASHINGTON — The Trump administration has told a federal court that construction of a new White House ballroom must proceed, arguing that national security concerns and presidential authority outweigh objections raised by a historic preservation organization seeking to halt the project. The position was outlined in a detailed court filing submitted Monday in response to a lawsuit challenging the demolition of the East Wing and the planned expansion of the Executive Mansion.
The lawsuit, filed by the National Trust for Historic Preservation, asks a U.S. District Court judge to pause the project until it undergoes multiple independent reviews, includes a public comment period, and receives approval from Congress. The group argues that federal law requires oversight by planning and fine arts commissions before any significant alteration to the White House complex can move forward.
In its response, the administration asserted that the preservation group lacks legal standing to sue and that its claims are either moot or premature. Justice Department attorneys argued that the East Wing demolition, which began in October, cannot be reversed, rendering objections to that phase irrelevant. Claims regarding future construction, they said, are not yet ripe for judicial review because final design plans have not been completed.
A central component of the filing was a declaration from Matthew C. Quinn, deputy director of the U.S. Secret Service, which is responsible for protecting the president and other senior officials. Quinn stated that additional work at the site is necessary to meet the agency’s safety and security requirements, noting that even a temporary halt would hamper the Secret Service’s ability to carry out its statutory mission. While the filing did not specify the exact national security concerns, the administration offered to provide classified details to the judge in a private, in-person briefing without the plaintiffs present.
The East Wing had previously sat atop an emergency operations bunker, a fact highlighted in the filing as part of the broader security considerations surrounding the site. According to the administration, construction activity below ground is continuing, with foundation work expected to begin in January. Above-ground construction is not anticipated until at least April 2026.
The government’s filing also shed light on the scope and timeline of the ballroom project, which is expected to cost an estimated $300 million and span approximately 90,000 square feet. The ballroom is designed to accommodate about 1,000 guests and is being privately funded. President Donald Trump has said the addition is intended to address long-standing limitations of the White House’s existing event spaces and to eliminate the need for large temporary structures when hosting foreign dignitaries.
The preservation group contends that the administration bypassed required review processes by failing to submit plans to the National Capital Planning Commission, the Commission of Fine Arts, and Congress before demolition began. The lawsuit states that letters urging a halt to the project and compliance with federal statutes were sent to those entities and the National Park Service after demolition started, but no response was received.
In defending the project, the administration emphasized the president’s authority to modify the White House, citing more than two centuries of renovations, expansions, and structural changes to the Executive Mansion. It also argued that the statutes referenced in the lawsuit do not apply to the president in this context and that required consultations will take place without court intervention.
Criticism of the ballroom proposal has emerged from preservation advocates, architects, and political opponents, who argue that the scale of the addition could significantly alter the character of the White House. Supporters within the administration point to long-standing discussions about the need for a larger event space, noting that a National Park Service comprehensive design plan from 2000 identified such a need due to increased visitation and the demands of major state functions.
A hearing on the case is scheduled for Tuesday in federal court in Washington, where a judge is expected to consider whether the lawsuit warrants an injunction or dismissal. The outcome could shape not only the future of the ballroom project but also the broader question of how presidential authority intersects with historic preservation law at the nation’s most symbolically significant residence.
