Pentagon
the world largest office building is in this state
pentagon
7754
Palace of the Parliament, Bucharest, Romania
The Pentagon is d world largest office building by floor area with about 6500000 sq ft (600000m2). It was built in September 11, 1941-January 15, 1943. Built by John Mc Shain. Inc. Five floors above ground and two floors below the ground (estimated).
No, the biggest building is Burj khalifa in Dubai. Correct, but it also depends on what you mean by "biggest"; tallest, office space, heaviest, etc. The largest office building in the world is still the Pentagon if I recall correctly.
ICICI Building in Gachibowli, Hyderabad
There is no largest building in the world in Washington. If you're looking for the largest building in the world, that would be the Burj Khalifa.
The Burg Al-Khalifa in Dubai is the largest-and tallest-building in the world.
jinan, china
The largest office building in the world is the pentagon, at 6.5 million square feet, or 34 acres. 3.7 million quare feet of this space is actually used for offices, housing 23,000 workers. It has 17.5 miles of corridors. http://www.greatbuildings.com/buildings/The_Pentagon.html
The world's largest office building is the U.S. headquarters of the Department of Defense, The Pentagon, with over 3.7 million square feet of space. 23,000 employees work in the building, located in Arlington, Virginia. Above retrieved from About.com Viper1