"Our attention now turns to maintaining operations in the short and medium term.
"We have extensive emergency and disaster procedures in place, which have been activated."
The statement indicated that moves are now being made to find a new Auckland site to rebuild on.
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"The team at United appreciate your patience and understanding at this time."
A total of 22 fire trucks from around Auckland were called to the scene, on Inlet Rd, and battled the flames for almost two hours before it was brought under control by 6.20pm.
Massive black clouds of smoke and flames could be seen from different parts of South Auckland and from further out of the area.
Fire authorities warned people to stay away from the area and to stay indoors away from smoke.