From NPR.

The scope of President Trump’s White House ballroom project is becoming more clear after yesterday’s public hearing before a planning commission that is dominated by Trump appointees.

A White House official and the architect leading the ballroom project presented an overview to the National Capital Planning Commission, including drawings and renderings of what the structure as designed would look like next to the existing White House. Architect Shalom Baranes said the ballroom will seat 1,000 people and have a footprint of 22,000 square feet. There had been talk of going bigger, but Baranes told commissioners, "Further consideration of enlarging the size was abandoned in late November."

He said the overall project is 89,000 square feet. The commission didn’t vote on the ballroom. That will come at a future meeting.