The National Park Service found that Trump’s planned ballroom would ‘adversely alter the design, setting, and feeling of the White House and the grounds over the long-term.’ President Donald Trump’s plans to add a ballroom to the White House would be bad for the design of the White House complex and grounds, according to a National Park Service (NPS) report. The report said the annex would “disrupt the historical continuity of the White House grounds and alter the architectural integrity of the easts side of the property.” Still, Trump is clear for now to move ahead with his plans.