TerraWatt St. Louis Armory Data Center
120 MW AI data center in St. Louis, MO, United States: permitted.
- Capacity: 120 MW
- Location: St. Louis, MO, United States
- Developer: TerraWatt
- Status: permitted
- Estimated cost: $3B
TerraWatt St. Louis Armory Data Center is a 120 MW AI data center project located in St. Louis, MO, United States, currently permitted. It is being built by TerraWatt. The estimated build cost is $3B. This project is one of thousands of data-center facilities tracked by Data Center Index across MO, United States, covering operational, under-construction, announced, and permitted sites.
Project description
St. Louis's Land Clearance for Redevelopment Authority gave final approval to a community benefit plan with TerraWatt for its planned 120 MW, $3 billion data center at the former Famous-Barr building at 3728 Market St.; construction is expected to begin in August 2027 and finish by late 2029. Conditional use permits were approved in April 2026.
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Frequently asked questions
- What is TerraWatt St. Louis Armory Data Center?
- TerraWatt St. Louis Armory Data Center is an AI data center project in St. Louis, Missouri tracked by Data Center Index. Its status is permitted.
- Where is TerraWatt St. Louis Armory Data Center?
- TerraWatt St. Louis Armory Data Center is in St. Louis, Missouri. Every tracked Missouri campus, with counts and capacity, is at https://datacenterindex.ai/markets/missouri.
- How big is TerraWatt St. Louis Armory Data Center?
- Data Center Index tracks TerraWatt St. Louis Armory Data Center at 120 MW, on an estimated $3B build. The developer or the press states that capacity, in a source dated September 15, 2026.
- Who is building TerraWatt St. Louis Armory Data Center?
- TerraWatt is developing TerraWatt St. Louis Armory Data Center.
- When will TerraWatt St. Louis Armory Data Center come online?
- The next building at TerraWatt St. Louis Armory Data Center is expected online 2029. That date is the first building going live, not the full build-out.
Sources
- St. Louis okays Midtown data center (stlpr.org · press · 2026-09-15)