SDC - Austin Tandem Data Center
Round Rock, Williamson County
SDC - Austin Tandem Data Center is a data-center site in Round Rock, Williamson County. Records link it to Cirrascale Cloud Services through the registered entity SDC - Austin LLC. It entered the Texas Comptroller's Qualifying Data Center program on Mar 13, 2024, a Texas program giving sales-tax exemptions to qualifying data centers.
Key numbers
No cost registered
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
Not published
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
Needs a construction cost
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
15 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
4 other recorded data-center sites are 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)
- Records dated Mar 13, 2024 to Mar 13, 2024. Each record in the history below links to its original filing.
Location
- Address
- 1300 Louis Henna Blvd
- How we know
- Location from a reviewed public-record compilation (see Methodology).
Who is behind it
- Registered entity on the recordsSDC - Austin LLC
- Linked organizationNamed on the Texas Comptroller registry recordSupporting record(opens in a new tab)
- Texas Comptroller registry entry Documented
- owner
- SDC - Austin LLC
- occupant
- Cirrascale Cloud Services, LLC
- operator
- SDC - Austin LLC
Evidence history
- Not met: At least one TDLR building registration+20
- Not met: Two or more TDLR building registrations+10
- Not 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
- A TCEQ air permit has been filed