Doofenshmirtz founded the company at an unknown point prior to movie. The overall structure of the building is identical to its 1st Dimension counterpart, but it also has a two-building extension, the tallest of which is the office of Doofenshmirtz himself. The company was apparently dedicated to only constructing Norm Bots. When Doofenshmirtz conquered the Tri-State Area, it allegedly took control of every business in the region.
It is unknown if the building is the only building used by Doofenshmirtz, or if there is also other DEI buildings like that of the 1st Dimension DEI, like a 2nd Dimension Doofenshmirtz Abandoned Self-Storage or a 2nd Dimension Doofenshmirtz Abandoned Vacuum Cleaner Factory.
It has its own logo.
It has been mostly likely closed down after Doofenshmirtz's arrest.