The height of data centers can vary based on the use and the land available. In more densely developed areas, data centers may be taller and the overall footprint smaller. In more rural areas, the footprint may be larger and the data center is reduced in height.
The important thing to note is that the height of data centers is heavily influenced by local zoning requirements. For instance, in Hobart, IN the zoning code limits data centers to 75 feet in height. In Dekalb, IL buildings within the ORI Office, Research, and Light Industrial District (in which data centers are allowed) are limited to 60 feet, with exceptions only by Special Use Permit and increases in buildings setbacks. This is on the scale of an industrial or warehouse building.
Sources:
Hobart Zoning Code CHAPTER 154: ZONING