Strip data centers out of the 2026 construction picture, and what's left is a recession. Backlog growth, planning momentum, hiring headlines, input price inflation: it all flows back to a single sector whose scale would have looked implausible five years ago.

Five hyperscalers have committed roughly $710 billion in capital expenditure for 2026 alone, the bulk of it tied to AI infrastructure. JLL's 2026 Global Data Center Outlook puts the broader supercycle at up to $3 trillion of total investment by 2030, with around 100 GW of new capacity coming online globally.

ConstructConnect tracked $77.7 billion in US data center construction starts in 2025, a 190% jump on the prior year. Another $88 billion of starts are queued for the next six months alone.

That kind of demand concentration is unprecedented in construction. It's also distorting the industry's surface metrics. Dodge's Momentum Index posted its first monthly rise of 2026 in March, and almost all of it came from data centers. ABC's December 2025 backlog reading sat at 8.2 months on average, but the 13% of contractors with data center work on their books were running closer to 11 months. Everyone else, 7.8 months.

The boom is real. It's also narrow.

Andy Cvengros, executive managing director and co-lead of US data center markets at JLL, says the sector has "officially entered hyperdrive." Underneath that headline, two construction industries are forming inside one set of statistics.

We heard the exact same thing in our recent conversation with Procore’s Kris Lengieza: a clear split between the “strategic economy” (data centers, infrastructure, power) and the “consumer economy” (residential, retail, office), with one booming and the other under pressure.

Firms with annual revenue above $100 million are reporting their highest backlogs since 2021. Firms below $30 million are reporting their lowest.

That gap traces back to one thing, as ABC chief economist Anirban Basu has been saying for months: the data center boom is concentrated among a small number of large general contractors and specialty MEP firms with the credentials, balance sheet, and craft depth to bid hyperscale work.

For the rest of the industry, the picture looks different. Office construction spending fell 13% year on year in January and is now 37% below early 2023 levels. Manufacturing megaprojects are recalibrating. Commercial spending ticked down. Nine of sixteen nonresidential subsegments declined in January. Economists keep saying the same thing in different words. Take away data centers, and demand is soft.

The asymmetry isn't fading. JLL forecasts North American data center vacancy at around 1% through the back half of the decade, with 92% of capacity under construction already pre-committed. That keeps pricing power with landlords and keeps the build pipeline tilted toward the same handful of operators who can execute at hyperscale.

Demand for data centers surges in 2026, with capital ready to deploy. Yet the industry can't keep pace. Electrical equipment shortages and a craft labor gap create the biggest hurdles.

Key Constraints:

Electrical equipment bottlenecks squeeze smaller players: Lead times for high-voltage transformers have ballooned from 24-30 months pre-2020 to 80-120 weeks today, with transmission units taking 3-6 years. This is happening because the US makes just 20% of what it needs, while China dominates 60% of global capacity.

This has real bite: Sightline Climate predicts 30-50% of large US data centers slated for 2026 will slip or be canceled, dropping planned 12-16 GW to only 5 GW under construction. Cushman & Wakefield notes construction capacity fell to 5.99 GW by end-2025, the first dip since 2020. Big hyperscalers locked in supply years ago, but independents, regional clouds, and newcomers now wait on substation gear they can't control.

Craft labor shortages drive up costs and favor specialists: "The electrician shortage is quite dire," Darrell West, senior fellow at the Brookings Center for Technology Innovation, told Fortune earlier this year. Electrical work accounts for 45-70% of data center build costs per IBEW data, amid a 439,000-worker industry gap led by electricians and pipe layers (ABC figures).

Wages reflect this: data center pros pull $120K-$180K, and IBEW's Northern Virginia local doubled to 14,700 members in seven years. Specialists in MEP, commissioning, and high-voltage thrive here. Everyone else grapples with labor inflation spilling into non-AI projects.

The framing most coverage uses is bullish or bearish on AI itself. Will revenue justify the capex? Is this 1999 again?

That's the wrong question for AEC leadership. Even if the bubble argument turns out right, the build-side commitments are already locked in for the next 24 to 36 months. The contracts are signed, the equipment is on order, and the substations are being permitted. A correction in AI valuations doesn't immediately unwind a hyperscale job in Mississippi.

The harder questions sit closer to home. How exposed is the firm if data centers become half of revenue and the cycle turns?

Will Senner, senior VP of preconstruction at Skanska USA Building, has flagged this directly: the firms with the most upside today are the ones that take the deepest hit on a pullback. Where does the spillover work sit? Grid upgrades, substations, water infrastructure, road improvements, and gas turbine sites for behind-the-meter power.

Smaller civil and specialty firms have a real opportunity here, and it's growing as hyperscalers push into frontier markets like West Texas, Tennessee, Wisconsin, and Ohio. Most of that work sits outside the data center footprint. And the workforce strategy 18 months out matters as much as the contracts already won.

If the boom continues, electrician supply remains the binding constraint. If it pauses, the firms holding inflated craft headcount with no backlog to absorb them will be the ones in trouble.

The contracts say the buildout continues at least through 2027. The harder conversation in any AEC boardroom right now is what the firm's revenue mix, supplier dependencies, and craft headcount should look like in the quarter after the cycle turns. That's the conversation worth having while the planning sheets are still full.

On the topic of supplier dependencies and material spend: our new Bricks & Bytes report, Material Advantage: How Technology Is Reshaping Construction Procurement, digs into the $60 to $120 billion of annual leakage hiding inside US construction's material flow, and what the new wave of procurement platforms is actually solving. [Read the full report]

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