Elon Musk does not seem interested in building ordinary factories anymore.
His next Texas project is supposed to be so enormous that even the word “megafactory” starts to feel inadequate.
Tesla and SpaceX plan to initially invest more than $16.8 billion in Terafab, a semiconductor manufacturing complex in Grimes County, Texas. SpaceX says the planned facility will contain more than 100 million square feet of manufacturing space, employ at least 3,000 people, and eventually produce advanced chips for Tesla’s Cybercabs and Optimus robots, along with SpaceX’s planned space-based data centers.
That is the headline-friendly version. But look closer, and Terafab becomes much more interesting.
Look closer, though, and Terafab becomes much more interesting. The scale is real, but so are the unanswered questions surrounding cost, construction, public incentives, and whether Musk’s companies can actually execute something this enormous.
That Jaw-Dropping Size Comparison Comes With an Asterisk
The number that immediately grabs attention is 100 million square feet.
Fortune framed the planned Terafab as roughly five times larger than the building commonly cited as one of the world’s largest by floor area. It is an irresistible comparison because 100 million square feet sounds almost absurdly large.
But there is an important wrinkle.
Renderings released by SpaceX show what appears to be four enormous rectangular buildings, rather than one conventional 100-million-square-foot structure. Business Insider reported that the planned factory is split among four massive buildings connected across the site.
That does not make Terafab less enormous. It does make the “largest building” comparison less straightforward, though.
Building-size rankings already vary depending on whether they measure floor area, footprint, or enclosed volume. Comparing an industrial manufacturing complex spread across multiple structures with a single giant building makes for great viral math, but it is not necessarily an apples-to-apples architectural comparison.
Terafab may still become one of the largest manufacturing campuses ever attempted.
It just does not need a clever statistic to sound outrageous.
The $16.8 Billion Price Tag May Be Only the Beginning
Then there is the money.
Texas officials describe Terafab’s first phase as an investment of more than $16.8 billion. SpaceX uses similar language, calling that figure the estimated capital requirement for the initial phase and saying later expansions could push investment“much higher.”
Then there is the money. And the question is how far it could go.
Potentially a lot.
Reuters reported that a May filing outlined an initial proposed investment of $55 billion, with additional phases potentially bringing the project to roughly $119 billion. The latest public announcement centers on the smaller $16.8 billion first phase, showing how fluid the financial scope of a project this ambitious can be.
That does not mean $119 billion will ultimately be spent.
It means the factory Musk is talking about today could become vastly more expensive if the full vision materializes.
For perspective, $16.8 billion is already a breathtaking manufacturing commitment.
The bigger numbers turn Terafab into something closer to an industrial moonshot.
Musk Is Trying to Escape One of Tech’s Biggest Dependencies
The size makes good headlines, but the real strategy sits inside the factory. What Musk wants is control, not just capacity.
Musk does not merely want Tesla and SpaceX to purchase more chips.
He wants them to control far more of how those chips are made.
SpaceX says Terafab will bring logic-chip manufacturing, memory production, packaging,g and testing together at one location. Tesla job postings for Terafab also describe work involving memory technology and advanced semiconductor manufacturing.
The reason is straightforward.
Tesla and SpaceX say their combined future needs could exceed one terawatt of computing power. Musk’s companies expect those chips to support autonomous vehicles,d humanoid robots, and powerful computing systems in space.
If that forecast is even close, relying entirely on outside semiconductor manufacturers could become a serious bottleneck.
Terafab is therefore more than another Musk factory.
It is an attempt to own a crucial piece of the supply chain underneath his AI ambitions.
Texas Is Rolling Out More Than the Red Carpet
A private project this large also comes with public involvement, and that invites scrutiny.
Texas Gov. Greg Abbott announced a $30 million Texas Enterprise Fund grant for SpaceX tied to the project. Terafab also qualifies under Texas’ Jobs, Energy, Technology and Innovation program. The state describes the Enterprise Fund as a performance-based incentive used to attract projects promising major investment and employment.
Supporters will argue that helping secure a $16.8 billion semiconductor project and 3,000 jobs is exactly what economic-development incentives are meant to accomplish.
Critics may ask why companies controlled by one of the world’s wealthiest entrepreneurs need taxpayer-backed incentives at all.
That debate will become even louder if Terafab expands toward the larger investment figures previously discussed.
The bigger the factory becomes, the more scrutiny its public support is likely to attract.
Not Everyone in Grimes County Is Celebrating Yet
State officials have welcomed Terafab enthusiastically.
Some residents appear less convinced.
Business Insider reported that nearly 900 Grimes County residents signed a petition seeking greater local oversight of major AI infrastructure projects receiving public incentives. Concerns have centered on the effect massive industrial development could have on the rural community.
SpaceX has tried to soften that tension.
According to Business Insider, the company agreed to make annual payments of $20 million to the county, roughly 78% of the property taxes it otherwise would have paid.
That creates an unusual balancing act. The promise is enormous, but so is the disruption.
Terafab promises thousands of jobs, enormous investment and a chance to put rural Texas at the center of America’s semiconductor race.
It also promises industrial development on a scale few communities ever experience.
Those two realities can exist at the same time.
The Hardest Part Starts After the Headlines Stop
Musk has built companies around ideas that once sounded ridiculous, from reusable orbital rockets to mass-market electric vehicles.
That history is precisely why Terafab cannot be dismissed as another flashy rendering.
But semiconductor manufacturing is notoriously complicated, capital-intensive, and unforgiving. Terafab is attempting something even more difficult by combining multiple stages of advanced chip production while chasing an unprecedented level of scale.
The plans are enormous. The investment is real. Texas is already backing the project. Tesla is recruiting semiconductor specialists. SpaceX says it intends to move quickly. Even so, a rendering is not a functioning semiconductor empire.
Still, a rendering is not a functioning semiconductor empire.
Musk may eventually build one of the most extraordinary factories on Earth.
For now, Terafab’s most revealing number is not 100 million square feet or even $16.8 billion.
It is the enormous distance still separating the promise from a fully operational factory.
