According to the Santa Clara County Fire Department the fire at Apple’s Valley Green facility last week resulted in $2 Million in damages. It is still unknown what exactly caused the fire.
Various reports indicate that the fire was burning for more than 3 hours. It was reported at 10:21 pm, and “under control” by 12:30 – so there is a slight discrepancy there, but its possible that the fire was either burning for a while before being reported, or that simply that “under control” doesn’t mean “out”.
The building housed primarily IT workers, and it is not currently known where they will be working while the building is repaired…but I’m sure Apple will figure something out.