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SDC SATB1

The first certified building on Stream's San Antonio campus at West Military Drive, occupied by Microsoft. Stream's public figures describe the full five-building plan, while state filings show individual tenant finish-outs inside the first building.

13Sourced facts8Source records4Open gaps

What the record establishes

Owner and operator of record
SDC SA III, L.P.[1]as of March 10th, 2024
Occupant of record
Microsoft Corporation[1]registry read August 27th, 2026
Address
11203 West Military Drive, San Antonio, Bexar County[2]
Full campus site area
135 acres[2]
Buildings planned at full campus buildout
5 buildings[2]
Full campus planned building area
1,500,000 sq ft[2]
Full campus planned information technology capacity
200 MW[2]
First building planned area
300,000 sq ft[2]
On-site substation capacity
334 MW[2]
Tenant hall finish-out area in each filing
24,000 sq ft[4]
Filed cost for each tenant hall finish-out
$10 million[4]
Tenant office finish-out area
26,000 sq ft[5]
Tenant office filed construction cost
$4.5 million[5]

What changes the reading

  • The campus capacity, acreage and building area are Stream's full buildout plan. They are not measurements of the first certified building alone.[2]
  • Separate state filings cover four tenant halls with the same area and budget, plus an office finish-out. The filings describe tenant work but do not name the tenant. Microsoft appears in the certification.[1][4][5][6][7][8]
  • The two capacity figures describe different parts of the design.[2]
  • Neither figure establishes current active load.[2]

Still not public

  • Current active load in the first building is not public.
  • The construction filings do not name Microsoft as the tenant.
  • Current operating status is not public.
  • Building-specific water use and cooling design are not public.

Source trail

  1. Data Center ListsTexas Comptroller of Public AccountsfilingRead August 27th, 2026.
  2. Stream Data Centers Breaks Ground on Hyperscale Campus in San AntonioStream Data CenterscompanyRead August 27th, 2026.
  3. San Antonio III Data CenterStream Data CenterscompanyRead August 27th, 2026.
  4. SDC San Antonio Building 1 Hall 2 Tenant FitoutTexas Department of Licensing and RegulationfilingRead August 27th, 2026.
  5. SDC San Antonio Building 1 Tenant Office FitoutTexas Department of Licensing and RegulationfilingRead August 27th, 2026.
  6. SDC San Antonio Building 1 Hall 3 Tenant FitoutTexas Department of Licensing and RegulationfilingRead August 27th, 2026.
  7. SDC San Antonio Building 1 Hall 4 Tenant FitoutTexas Department of Licensing and RegulationfilingRead August 27th, 2026.
  8. SDC San Antonio Building 1 Hall 5 Tenant FitoutTexas 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.