The setup marks a rare use of the White House grounds for a major sporting production.
The event is expected to be part of broader celebrations marking the 250th anniversary of the United States, as well as President Donald Trump’s 80th birthday.
Recent images and reports show workers installing staging materials, lighting rigs, and foundational structures across the lawn.
The build includes a temporary octagon cage, spectator seating, and production infrastructure designed for live broadcasting.
The UFC has described the project as a large-scale outdoor arena capable of hosting about 4,000 to 5,000 invited guests on-site.
Additional viewing areas are expected to be set up at nearby public spaces, including The Ellipse, where larger crowds may watch the fights on big screens.
Organizers say the structure is being assembled in stages, with pre-fabricated components transported from manufacturing sites and installed under tight security conditions.
Construction logistics include heavy equipment movement, temporary flooring, and support structures designed to stabilize the South Lawn for a combat sports event.
The planned event is expected to feature high-profile UFC matchups, including championship bouts, and will be broadcast globally through UFC media partners.
The White House is expected to serve as a backdrop for the main fights, creating a unique visual setting not previously used in professional sports.
Supporters of the project describe it as a symbolic celebration of American independence and military service.
Critics have raised concerns about the blending of political space with commercial entertainment, as well as the logistical and security challenges of hosting such an event at the White House.
Officials involved in planning have stated that the event is being coordinated with federal security agencies and will follow special event protocols similar to major national gatherings.