SpaceX Proposes $50 Billion Arizona AI Campus With 6-Gigawatt Target

SpaceX has proposed a $50 billion artificial intelligence computing campus in Cochise County, Arizona, targeting up to 6 gigawatts of capacity and substantial work on the local power grid.

Tombstone Resources LLC, a SpaceX affiliate, filed an application for special-use authorization on Oct. 30. The proposed development covers 747 acres and could include up to nine buildings, each about 493,000 square feet. Construction would proceed in four phases, with each adding about 1.5 gigawatts toward the full capacity target.

The plan also includes a battery with 24 gigawatt-hours of storage and $3.6 billion in grid upgrades. The figures measure different things: gigawatts describe the campus's target power capacity, while gigawatt-hours measure the battery's storage capacity. SpaceX plans to add the campus capacity in stages rather than all at once.

At a Nov. 4 town hall, Riley Trettel, SpaceX's head of energy and supercomputing development, told residents the company would build, own and operate the site. If completed, the development would be SpaceX's first grid-connected AI computing facility at gigawatt scale.

The project is expected to create 6,500 jobs, including about 1,000 permanent positions and thousands of construction jobs. SpaceX has also presented potential property-tax revenue for Cochise County and said the campus could lower electricity bills for customers of local cooperatives.

SpaceX plans to use dry-cooling technology and projects annual water use of seven to 10 acre-feet. The company has compared that amount with the yearly water use of 20 to 30 homes.

The Cochise County Planning and Zoning Commission has a public hearing scheduled for Dec. 9. If the proposal clears that step, construction could begin as early as March 2027.

SpaceX has a separate power-and-computing proposal in Starbase, Texas. Its estimated $24 billion initial phase combines a gas-fired power plant and a supercomputing complex, with tax incentives on the Starbase City Council's Dec. 9 agenda. The Texas power and supercomputing project is a separate development from the Arizona campus.