CyrusOne files to develop three buildings for $1.5bn data center campus in Fairfield, Texas
CyrusOne filed with Texas regulators to develop a 760MW data center campus in Fairfield, Texas, next to Calpine’s Freestone Energy Campus. The plan calls for three buildings (DFW20A-C) costing $1.5bn, powered by a 1GW gas combined-cycle facility. CyrusOne has started two buildings; completion is expected by Aug 2027, with no tenants assigned yet.
How this was made

The 30-second read
Why it matters
The newest concrete disclosure is the full project scope and cost ($1.5bn) plus construction sequencing and completion target (end of August 2027), while tenant assignments are not yet set.
Market read
Permits and project details provide a tangible datapoint for data-center capacity growth tied to specific power infrastructure, but lack of tenant and contract terms limits immediate earnings implications.
What to watch
Construction timing (third building starting next month) and the absence of assigned tenants could delay monetization, making the market reaction more muted than the headline capex suggests.
Background
CyrusOne filed Texas Department of Licensing and Regulation permits for three buildings at a new Fairfield, Texas data center campus next to Calpine’s Freestone natural gas power plant.
Ticker impact
Constellation is named as the parent of Calpine, which is partnering on CyrusOne’s 760MW Fairfield data center project next to the Freestone power plant.
Limited near-term impact expected; any move would likely be sentiment-driven around data-center capex and power demand rather than a standalone earnings catalyst.
The article discloses a new 760MW campus and that Calpine is the operator of the Freestone Energy Campus, but it does not provide financial terms, revenue recognition, or guidance for CONE.
Market effects
Adds another large US data-center build tied to gas-fired power capacity, reinforcing the power-constrained narrative for hyperscale and colocation.
Fairfield, Texas area sees new 760MW load growth adjacent to Freestone Energy Campus, potentially tightening local power demand expectations.
US data-center capacity additions can influence broader colocation supply-demand and power procurement sentiment, but details are localized.
Counterpoint
Without tenant commitments or disclosed power contract terms, the project may not translate into near-term revenue certainty for the involved power owner.
Key entities
- companyCyrusOne
Data center operator filing permits to develop three buildings totaling 918,650 sq ft for a new Fairfield campus.
- companyCalpine LLC
Operator of the Freestone Energy Campus that will power the project; wholly-owned subsidiary of Constellation Energy per the article.
- companyConstellation Energy Corporation
Parent of Calpine, referenced as the operator linkage for the Freestone power facility powering the data center campus.
- regulatorTexas Department of Licensing and Regulation (TDLR)
Agency where construction permits were filed for the three data center buildings.


