AI data centers are now an $85 billion construction line, up 73% in a year, while factories shrink. Here's the backlog risk for subs
August Census data shows data center construction spending at an $85 billion annual rate while factory work fell about 20%. For a trade sub, the question is how much of the backlog now rides on one owner type.
Data center construction is now running at about an $85 billion annual rate, up more than 73% from a year ago, while factory construction fell roughly 20% over the same period. For a trade sub, that means the work available is moving toward one owner type fast, and a backlog built around it carries risk that the monthly spending number does not show.
What does the August data say?
The Census Bureau's August construction spending release, as reported by ENR, Construction Executive and others, shows:
| Sector | August 2026 | Trend |
|---|---|---|
| Data centers | ~$85B annual rate | +7.5% in the month, +73% year over year |
| Manufacturing (factories) | ~$168B annual rate | Down about 19% to 20% year over year; first monthly gain since January was 0.2% |
| Power | ~$186B annual rate | +0.8% in the month, +8.5% year over year |
| All construction | ~$2.203T annual rate | +0.9% in the month, down 1.7% year over year |
ABC's analysis, relayed by ENR, says data center spending has grown at a 149% annualized pace since March. Wolf Street, which broke out the factory comparison, notes that factories are still nearly twice the size of data centers in dollars. The gap is closing from both directions.
Why is this an AI story?
The data center growth is the physical bill for AI model training and inference. Owners are buying shells, electrical gear, mechanical plant and power. That is the demand a Div 23 or Div 26 sub is bidding into. We cannot see from this release who is behind each project, and Census spending is put-in-place cost, not new awards, so it lags what is being bid today.
What does this mean for a trade sub's backlog?
Three practical checks:
- Measure concentration. Take your signed backlog and tag each job by owner type. If one hyperscale or colocation customer is a large share, you have a single-customer risk even if each contract is separate.
- Check what a stall costs. Data center schedules depend on power delivery and permits, not just construction. Our earlier look at a canceled turbine order shows how a power delay lands on the trades. Ask what your contract says about standby, remobilization and long-lead gear you already bought.
- Watch the factory side. A sub that lost industrial work and replaced it with data center work has swapped one exposure for a bigger, faster one. With factory spending down about 20%, expect more subs bidding the same data center jobs.
Should a mid-size sub chase more data center work?
Only with a cap. The growth is real, but a 149% annualized pace is not a pace anyone plans payroll against.
The takeaway
This week, pull your backlog and compute the share tied to AI-related owners. Set an internal ceiling, and know which two or three jobs would stall together if one owner's capital plan changed. Then read the payment, suspension and long-lead terms in those contracts before the next bid, not after a delay.
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- How much is the U.S. spending on data center construction?
- Census figures for August 2026 put data center construction at a seasonally adjusted annual rate of about $85 billion, up more than 73% from a year earlier, according to an Associated Builders and Contractors analysis of the federal data.
- Is data center construction bigger than factory construction?
- Not yet. Factory construction ran at about $168 billion annually in August, nearly double data centers, but it fell roughly 19% to 20% from a year earlier while data centers rose.
- Why does data center concentration matter to a subcontractor?
- A sub whose backlog leans on one owner type carries correlated risk. If hyperscaler capital plans, power availability or permits slow, several jobs can stall together, and a sub's crews and long-lead orders are committed to all of them.
- Which construction sectors are growing alongside data centers?
- Power-sector construction rose 0.8% in August and 8.5% from a year earlier, to an annual rate of about $186 billion, according to reports on the Census release. Data centers and power are driving nonresidential growth.