Welcome to Global Data Center Hub. Join investors, operators, and innovators reading to stay ahead of the latest trends in the data center sector in developed and emerging markets globally.
Most people meet data centers through headlines.
A tech company announces a giant new campus, a warehouse full of the computers that run AI tools like ChatGPT and puts a number on it in megawatts.
That number is a promise. The building behind it tends to show up years later, and sometimes later than even its builders planned.
So how long does it take to build a data center? The short answer is years. The longer answer starts in Denton, Texas.
Core Scientific spent years mining bitcoin before agreeing to convert its Denton site into an AI campus for CoreWeave, which rents computing power to AI firms. Core Scientific puts the full campus at 262 megawatts.
The Wall Street Journal reported on December 15, 2025, that CoreWeave planned to use it to serve OpenAI, the maker of ChatGPT.
The trouble showed up early. Core Scientific’s quarterly report for the period ending June 30, 2025, warned that weather and construction delays had pushed its delivery dates later in the year.
Then, on November 10, 2025, CoreWeave lowered its forecast for the year. It blamed a third-party data center developer that was behind schedule, and said its customer had agreed to move the contract dates.
A month later the Journal filled in the details. Summer rain and wind had kept crews from pouring concrete at Denton for about 60 days. Completion slid back by several months. For a site that size, one wet summer was enough.
The site did come online, in stages. On March 2, 2026, Core Scientific told investors that Denton was running about 130 megawatts that customers were paying for, roughly half the campus.
The cost was real. Capacity meant for the company behind ChatGPT arrived months late, and CoreWeave had to cut its outlook for the year.
Denton was unlucky with the weather, but the shape of its problem is common. AI companies sign up for computing space long before they need it.
Every one of those contracts then has to pass through the same physical steps: power reaching the site, heavy equipment arriving, crews building, engineers testing. If one step slips, the whole building waits.
The Long Road From Signed Contract to Live Building
A data center comes to life in stages, and some stages take far longer than others.
Power comes first. The builder asks the local utility for electricity.
The utility then studies whether its high-voltage lines, the tall steel towers that carry power across a region, can deliver that much to one spot. If those lines are already full, someone has to build new ones.
Next comes the gear that links the building to the grid.
The key piece is the transformer, a large machine that turns long-distance electricity into a level a building can use. After that, crews build the halls and install the cooling and backup power, and engineers test the whole system.
Only at the very end do customers roll in their servers, the flat computer trays that do the actual work, and start paying.
Think of a restaurant that takes bookings before it opens. The bookings are real. But nobody eats until the kitchen is built and the gas is hooked up.
NEXTDC, a large Australian data center company, has put this gap in its own numbers. In a stock exchange release on July 21, 2026, it reported customer contracts for 740 megawatts as of June 30, 2026.
Customers were paying for 175 of them. Put another way, for every four megawatts signed, about one was running.
NEXTDC expects the rest to switch on in stages through its 2030 financial year.
Headlines Count Contracts. The Grid Counts Buildings.
Most readers would assume an announced data center is running, or close to it. It is a fair guess.
Announcements and working buildings use the same unit, the megawatt, so the numbers look like they mean the same thing.
Companies report what they have signed because a signed contract is a real commitment with real money behind it.
News stories repeat that figure because it is the biggest, newest number on the page.
Look closer and each megawatt has a life story. A contracted megawatt is a reservation. Later, once power reaches it, it becomes energized.
Only at the last stage does it run any AI, because a billing megawatt has servers inside doing work for a paying customer.
NEXTDC’s 740 and 175 are both true. They describe different points in that life story.
Core Scientific drew the same line on March 2, 2026, when it said it would report megawatts only once they start billing.
Power Lines and Transformers Run on a Slower Clock
The slowest steps usually happen outside the building, in the power grid, and they take years to fix.
Northern Virginia has lived through this. Loudoun County, around the town of Ashburn, holds one of the densest clusters of data centers anywhere.
In July 2022, Dominion Energy, the main utility there, told data center builders that its high-voltage lines in the eastern part of the county could no longer carry power to new buildings on the schedule they expected.
Builders who had already bought land and drawn up plans were left waiting on the utility, with no firm date for when the power would come.
Dominion started connecting new buildings again that fall, in small amounts. Even so, DatacenterDynamics reported in October 2022 that some planned projects faced waits of up to four years for their full power.
The fix is a loop of new high-voltage lines around the area people call Data Center Alley, and it is arriving one piece at a time.
Dominion’s project page shows the first equipment on its new Mars to Wishing Star line switched on in January and February 2026.
The last piece, the Golden to Mars line, won final route approval from Virginia’s State Corporation Commission on June 29, 2026.
Dominion has said that line must be in service by June 1, 2028. Count from the first warning to the last line, and the repair takes about six years.
Equipment brings its own wait. Wood Mackenzie, an energy research firm, found in its survey for the second quarter of 2025 that large power transformers took an average of 128 weeks to arrive after ordering.
That is about two and a half years for one machine, and a large campus needs more than one.
A storm can stop a concrete pour for a couple of months. A new power line needs an approved route, settled through public hearings, before the first tower goes up. A transformer needs a slot in a factory’s order book. Those waits run to years.
Who Waits When a Data Center Runs Late
Start with the companies counting on the space. When Denton slipped, CoreWeave had to tell its shareholders, and OpenAI had to wait longer for computing it had planned around.
An AI tool can only serve as many people as the buildings behind it can handle, so a late building leaves less room to grow for the app on your phone.
Then there are the neighbors. The new lines that end these long waits have to run somewhere.
In Loudoun County, homeowners fought the Golden to Mars route, which will bring tall new towers close to houses, and one neighborhood group asked regulators to reconsider.
If you live near a planned data center, the slowest part of the project may be a power line through your neighborhood, and the public hearing that decides where it goes.
And if you simply follow AI news, the gap changes how every big announcement reads. A headline marks the start of a long build.
The AI features you use next will run in buildings that have already made it all the way through.
Four Clues Hidden in Every Data Center Announcement
Start with the verb next to the number. Signed and contracted describe reservations, while energized and billing describe buildings doing work.
Company announcements and quarterly reports often use both in the same paragraph, and NEXTDC’s July 2026 release shows how far apart the two numbers can sit.
Watch for dates that drift. When quarterly filings keep pushing delivery dates later, as Core Scientific’s did through 2025, the schedule is under strain well before a headline says so.
Those filings sit on company investor pages and in the public database of the US Securities and Exchange Commission.
Look for the power line. A data center that needs new high-voltage lines will show up in a state utility commission case or on a county planning agenda, the way the Golden to Mars line went through Virginia’s State Corporation Commission.
Those cases show how many years the power side expects to take, often in more detail than the developer’s announcement.
Finally, set the opening date against the equipment wait. Large transformers took about 128 weeks to arrive in Wood Mackenzie’s 2025 survey.
If a campus promises to open much sooner than that, either the equipment was ordered long before the announcement, or the date is likely to move.
Announcements move at the speed of a press release. The buildings that run AI move at the speed of the grid and the factories that supply it.
Can utilities and equipment makers speed up enough to close that gap, as the announcements grow larger? Every new campus headline puts that question back on the table.