Plans? Permits? ... on a commercial refit?
That would be strange to me.
I have seen entire data centers carved out of warehouse space and never went through plan review or permitting. That is one of the main reasons why IBM had installation planning reps.
Somebody needed to put some logic into the process, if for nothing else, to assure the proper operation of our equipment and safety of OUR employees.
It was a free service for most of the years IBM offered it as long as you were buying or leasing something new.
You could buy one tape drive and get your whole data center redesigned. We didn't have red tags but we could refuse to plug in our equipment or service it.
