Microsoft Corporation (SAT 89-90)
Castroville, Medina County
Microsoft Corporation (SAT 89-90) is a data-center site in Castroville, Medina County. Records link it to Microsoft through the registered entity Microsoft Corporation. It entered the Texas Comptroller's Qualifying Large Data Center Project program on Apr 4, 2024, a Texas program giving sales-tax exemptions to large data-center projects. TDLR lists 1 construction registration with estimated costs totaling $765M.
Key numbers
1 TDLR registration
What this means
The builder's estimated construction cost, added up across the site's TDLR registrations.
Limits: An estimate filed before construction, not an audited amount. Many sites have no TDLR registration, so it's shown as unavailable, not zero. Registrations can overlap, for example a renovation of an already registered building.
Unit: US dollars · Registrations filed to date
489,400 square feet
What this means
Floor area published on the site's TDLR registrations, added up.
Limits: Published for only some registrations, and registrations can overlap.
Unit: square feet · Registrations filed to date
From construction cost, not measured
What this means
A rough size estimate. It's the registered construction cost divided by an average all-in cost of building one megawatt of data-center capacity.
Limits: Not a measured or requested load. The real power draw can be much higher or lower. Available only where a construction cost is registered.
Unit: megawatts (MW) · As of Sep 26, 2026
50 of 100 checklist points
What this means
How much public-record evidence supports that the project is real and advancing: registrations, certification, tenant named, permits, inspections.
Limits: A checklist score, not a probability that the site will be built or operate at any size.
Unit: 0–100% (uncalibrated) · Scored Sep 26, 2026
Why this might matter to you
1 other recorded data-center site is within 10 miles of this one. Clusters of large facilities are part of what local utilities and grid planners must serve. These records don't measure local effects on bills, water or reliability.
Registration in the Comptroller program means the state lists this site as eligible for a data-center sales-tax exemption. The registry doesn't publish the value of any exemption.
Where this information comes from
- Texas Comptroller, Data Centers in Texas registry1 record for this siteOriginal source(opens in a new tab)
- Texas Department of Licensing and Regulation, TABS project search2 records for this siteOriginal source(opens in a new tab)
Location
- Address
- 2995 US HWY 90 W
- How we know
- Address from the site's TDLR construction registration.
Who is behind it
- Registered entity on the recordsMicrosoft Corporation
- Linked organizationNamed on the Texas Comptroller registry recordSupporting record(opens in a new tab)
- Texas Comptroller registry entry Documented
- owner
- Microsoft Corporation
- occupant
- Microsoft Corporation
- operator
- Microsoft Corporation
Evidence history
- Met: At least one TDLR building registration+20
- Not met: Two or more TDLR building registrations+10
- Met: Total registered construction value of at least $500M+15
- Not met: A tenant is named in a TDLR record+20
- Met: Certified by the Texas Comptroller data-center program+15
- Not met: A TCEQ air permit has been filed
Other Microsoft sites
- Microsoft CorporationSan Antonio
- Microsoft Corporation (SAT 15-17)San Antonio
- Microsoft Corporation (SAT 80-85)Castroville
- Microsoft Corporation (SAT09 - SAT13)San Antonio
- Microsoft San Antonio (SAT14)San Antonio
- NADCSan Antonio
- QTS Irving 1Irving
- QTS Irving DC3 Data CenterIrving
And 8 more on the organization profile.