Texas AI Docket

Texas data centers Every registered facility.

Certified facility dossier

Microsoft Corporation (SAT 80-85)

A Microsoft campus outside Castroville whose certification names six building labels. Public construction filings document the first three. The other labels remain names in the tax record without matching project filings found in this review.

11Sourced facts4Source records4Open gaps

What the record establishes

Owner, occupant and operator of record
Microsoft Corporation[1]as of March 31st, 2022
Address
18844 FM 1957, Castroville, Medina County[2]
Building labels named in the certification
6 buildings[1]
SAT80 filed construction cost
$135 million[2]
SAT80 filed building area
106,012 sq ft[2]
SAT81 filed construction cost
$95 million[3]
SAT81 filed building area
106,012 sq ft[3]
SAT82 filed construction cost
$482.6 million[4]
SAT82 filed building area
244,676 sq ft[4]
SAT82 colocation facilities in the filing
5 units[4]
SAT82 construction window in the filing
April 2026 to February 2028[4]as of August 26th, 2024

What changes the reading

  • The later filing is much larger than the first two and describes several colocation areas. It is a separate construction record, not evidence that the other named buildings share its size or layout.[2][3][4]
  • The first two filings carry completed inspection records. Those records cover accessibility review and do not establish whether either building is serving computing load.[2][3]

Still not public

  • Equivalent construction filings for the last three building labels were not found.
  • Current operating status is not public.
  • The campus's information technology load is not public.
  • Water use and cooling design are not public.

Source trail

  1. Data Center ListsTexas Comptroller of Public AccountsfilingRead August 27th, 2026.
  2. Microsoft SAT80Texas Department of Licensing and RegulationfilingRead August 27th, 2026.
  3. Microsoft SAT81Texas Department of Licensing and RegulationfilingRead August 27th, 2026.
  4. Microsoft SAT82Texas 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.