It must be noted that the demolition of a building requires extensive planning and placement of a large number of explosive charges, a process that takes several days. ... New York City fire department personnel did not have the proper qualifications for such demolition, nor did they have reasonable access given the significant damage and ongoing large fires in the structure to conduct such a controlled demolition.
...Another frequent claim in the theory that 7 WTC was intentionally demolished was the nature of the collapse of the building, in that it collapsed mostly within its own footprint. However, NIST has stated the collapse sequence within their working hypothesis "is consistent with all evidence currently held by NIST, including photographs and videos, eyewitness accounts and emergency communication records." (
http://www.nist.gov/public_affairs/factsheet/wtc_keyfindings.htm).
Thus, according to the NIST the building could indeed fall within its own footprint without there being a controlled demolition.