Standing at 828 meters ( 2,716 feet tall ) with 211 Total Floors (209 Above Grade & 2 Below Grade), (2 Parking, 14 Mechanical, 46 Spire / Mechanical, 90 Residential, 37 Office, 13 Hotel, 4 Communication & Broadcasting, 5 Miscellaneous)
In order to enable the tower’s extreme height and promote the most efficient use of space, the team created a new structural system. Named the “buttressed core”, each of the three wings buttresses the others via a six-sided central core, forming a tri-axial, “Y” shaped plan. ( Source: pswscience)

Source: Alex / Thanks to MENA Infra.
Not only is Burj Khalifa the world’s tallest building but it has also broken 2 other impressive records: the tallest structure, previously held by the KVLY-TV mast in Blanchard, North Dakota, and the tallest free-standing structure, previously held by Toronto’s CN Tower.