Hillary Clinton's Election Night Event

Hillary Clinton's election night event is worthy of presidential notice ... and the joint's in full construction mode.

HC will be hosting a party of one sort or another at the Jacob Javits Center's Crystal Palace in NYC. Crews have already started building a stage, risers and stands for a huge audience.

We're told she's renting section 3E of the Palace -- all 119,000 square feet of it. The floor dimensions are 456' x 286', with 33 foot high ceilings ... and an occupancy capped at 3,930.

As of Friday, crews were also setting up the audio systems.