It will be the latest change introduced to what’s known as the “people’s house” since the Republican president returned to office in January.

Officials said a 90,000-square-foot addition to the East Wing would be paid for by President Trump and other donors.

Construction will begin in September on a $200 million, 90,000-square-foot ballroom, his press secretary announced Thursday, fulfilling a 15-year ambition by the president to construct an event space on the White House grounds that expands the building’s entertaining capacity — but also resembles the gilded spaces of his private clubs.