While on site I was looking for the right word for such a building. It's a maybe a so called fake buildings (see https://en.wikipedia.org/wiki/List_of_fake_buildings).
Further on the PDOK images I notice a huge air conditioning on the rooftop.
So please check again on site and confirm my assumption (or not0.
My suggestion for the building is:
building=apartment
building:use=service
description=Data center for KPN (or something else)