The National Park Service found that the 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 east side of the property.” Still, Trump is clear to move ahead with his plans.