US data center construction spending surges 46% year-over-year to $68 billion, driven by AI infrastructure demand

Data center construction spending has hit an annualized rate exceeding $68 billion, marking a 46% year-over-year increase according to US Census Bureau figures. This surge reflects an insatiable appetite for AI compute capacity that has transformed vacant land into some of the most coveted real estate in technology.

This growth trajectory has been sustained since early 2024, accelerating through 2025 with annual spending rates reaching $45 billion to $50 billion or more in various months throughout the year.

Bitcoin miners are executing one of the most dramatic strategic pivots in recent memory. Companies including IREN, Cipher Mining, CleanSpark, Hut 8, and Core Scientific have realized that their true asset isn't mining capacity—it's power infrastructure that AI companies desperately need. These firms, which built their businesses around securing cheap power and running ASICs continuously, are now converting mining sites into AI data centers through a wave of multi-billion-dollar lease agreements, effectively swapping SHA-256 hashes for transformer model training runs.

Microsoft and Meta have significantly increased their data center lease commitments to support AI expansion. These hyperscalers have discovered that the miners' core competency—securing large-scale power agreements in favorable jurisdictions—addresses the exact bottleneck preventing rapid AI infrastructure deployment.

The broader nonresidential construction landscape has been mixed, making the data center segment's performance particularly striking.

For crypto-adjacent companies, the implications are substantial. Publicly traded Bitcoin miners that have secured AI and HPC leases are effectively diversifying their revenue streams in ways that reduce their dependence on Bitcoin's price. Core Scientific, which emerged from bankruptcy to become a major AI infrastructure player, now trades on a fundamentally different thesis than a pure-play miner. If miners find it more profitable to lease facilities for AI workloads than to mine Bitcoin, hashrate could migrate away from the network. As facilities transition to AI use cases, displaced mining hardware risks flooding the secondary market and depressing costs for remaining miners.

The 46% year-over-year growth rate represents far more than a one-quarter anomaly. Sustained acceleration since January 2024 indicates this is a multi-year buildout cycle.