Texas AI Docket

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San Antonio Data Center III

The second Microsoft certification at CyrusOne's Westover Hills campus. A CyrusOne compliance document and a state construction filing use different building numbers at the same street address, so the public record does not support merging those labels.

6Sourced facts4Source records4Open gaps

What the record establishes

Owner and operator of record
CyrusOne LLC[1]as of May 25th, 2017
Occupant of record
Microsoft Corporation[1]registry read August 27th, 2026
Certified building address in the compliance matrix
9554 Westover Hills Boulevard, Building 2, San Antonio, Bexar County[3]
Current campus technical space
295,785 sq ft[2]as of August 27th, 2026
Current campus information technology capacity
36 MW[2]as of August 27th, 2026
Building 3 filed construction cost at the same address
$22 million[4]

What changes the reading

  • CyrusOne's compliance matrix calls the certified property Building Two. The construction register calls a project at the same street address Building Three. They may describe different structures on the site, and neither source supplies a crosswalk.[3][4]
  • The campus totals combine the buildings CyrusOne now markets together. They are not a measurement of Microsoft's space in this certification.[2][3]
  • CyrusOne says its current campus uses water-free cooling. The company publishes that design for the campus and does not give a building-specific water figure.[2]

Still not public

  • Microsoft's contracted or active load in this building is not public.
  • The conflicting building numbers are not reconciled in public records.
  • Building area is not separated from the campus total.
  • Building-specific water use is not public.

Source trail

  1. Data Center ListsTexas Comptroller of Public AccountsfilingRead August 27th, 2026.
  2. San Antonio Data Center CampusCyrusOnecompanyRead August 27th, 2026.
  3. CyrusOne Compliance MatrixCyrusOnecompanyRead August 27th, 2026.
  4. CyrusOne SAT Building 3Texas Department of Licensing and RegulationfilingRead August 27th, 2026.

The registry entry for this facility comes from the Texas Comptroller's certified list of data centers holding a sales tax exemption. Owner, occupant and operator are roles in that filing rather than descriptions of who runs the building.