One of the proposed renovation plans for the John F. Kennedy Center for Performing Arts could allow the building to remain partially open as it undergoes repairs and upgrades over the next several years – but it could cost more than double what Congress has already allocated.

The proposal, one of two pitched by Delta Consulting Group, would allow the National Symphony Orchestra to perform on-site by partially closing the building in phases over four years, according to 180 pages of plans seen by Axios.

While the plan would prevent the entire Kennedy Center from shutting down during the renovations, it would cost upward of $560 million – more than double the $257 million Congress has already approved.

The Kennedy Center Board of Trustees, led by President Donald Trump, will consider the proposal from the consulting group along with others in a meeting Thursday.

The Independent has asked the White House and the Kennedy Center for comment.

Delta Consulting Group also proposed a much cheaper option for the renovations that would require most of the building to shut down.

That option, which would cost an estimated $287 million, would see the main building close for two years and send the National Symphony Orchestra “offsite,” as well as move the Kennedy Center Honors and Mark Twain Prize elsewhere.

While the building wouldn’t be able to host events, it would only require an additional $30 million on top of the congressionally approved funds.

A spokesperson for the Kennedy Center told Axios that “A comprehensive, nearly 200-page document encompassing independent, third-party analysis, was provided to the full Board for review ahead of the upcoming meeting where renovation discussions will take place.”

In February, Trump announced that the Kennedy Center would close for a two-year renovation to fix outdated infrastructure and upgrade parts of the building.

Among issues needing to be addressed, aging expansion joints and soffit panels need to be replaced and repaired, water drainage isused needs to be remediated, structural points in the parking garage need to be fixed and the theater seats need to be updated.

The internal documents, seen by Axios, suggest that the theater seats need to be upgraded for roughly $24.7 million. They also propose renovating the Grand Foyer.

But the renovations are also arriving at a contentious time for the center.

Last year, shortly after taking office, Trump overhauled the Kennedy Center Board of Trustees by dismissing its members and installing a handpicked board that appointed him the chair.

Dozens of artists canceled performances after Trump’s takeover, including the San Francisco Ballet, Phillip Glass, a touring production of Hamilton, the Washington National Opera, Issa Rae and more.

Later in the year, the board voted to rename the Kennedy Center by tacking Trump’s name onto the building alongside Kennedy’s, drawing outrage from lawmakers, members of the public and performers.

But this year, a federal judge ruled the renaming was illegal, resulting in Trump’s name being removed from the building.