This list ranks the top 25 buildings throughout the world with the largest amount of floor area. Upon its opening in October 2008, Terminal 3 at Dubai International Airport at 1.5 million m² (16.1 million sq ft, or 370 acres) of floor space surpassed the former leader, the Aalsmeer Flower Auction (990,000 m², or 10.6 million sq ft). Terminal 3 has a capacity of 43 million passengers, which by itself would be enough to place Dubai among the 20 busiest airports in the world by passenger traffic. For its part, the Aalsmeer Auction sees about 19 million flowers sold every day.

ThyssenKrupp AG's Mobile, Alabama steel mill facility upon completion in late 2009 will be 7.7 million sqft.


Special categories
List of the world's largest shopping malls
Largest floor space
Largest usable space