The Burj Khalifa is not fully occupied ; the residential portion is largely filled, while the office portion has historically had much lower occupancy. A reported figure from BBC said about 80% of the luxury apartments were occupied , but roughly two-thirds of the offices were not occupied at that time.

What that means

  • Residential space: mostly occupied, especially compared with the office floors.
  • Office space: much emptier than the homes, with a large share remaining unused.
  • Whole tower: there is no single public “occupied percentage” for the entire building in the source results, because it mixes homes, offices, hotel, and other uses.

Quick read

If you mean the tower overall, the safest answer is: a significant part is occupied, but a substantial share is still unoccupied, especially in office areas.

TL;DR

Burj Khalifa is partly occupied, not fully , with residential units much fuller than office floors.