Google · Cheshunt, Hertfordshire, United Kingdom

Google Waltham Cross

124MW

The power of 100,000 US homes.

Drawing power since Sep 2025.

H100-equivalents: 124K
Capital cost: $3.3B
Chips: TPU v6e
Users: Google DeepMind (unconfirmed)
Energy: Shell Energy Europe, Engie

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This site on the globe

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Every site on the globe

<iframe src="https://jesseahawkins.com/buildout/embed/" title="The AI buildout: the world's largest AI data centers on a globe" width="100%" height="600" style="border:0;max-width:100%" loading="lazy"></iframe>

Each frame credits Epoch AI and links back to its page. Preview it.

Cite

This page

Jesse Hawkins, “Google Waltham Cross · The AI buildout”, jesseahawkins.com, data retrieved 22 Oct 2026. https://jesseahawkins.com/buildout/google-waltham-cross/. Data: Epoch AI, “AI data centers”, CC BY 4.0.

BibTeX

@misc{hawkins2026buildoutgooglewalthamcross,
  author = {Hawkins, Jesse},
  title = {{Google Waltham Cross · The AI buildout}},
  year = {2026},
  howpublished = {\url{https://jesseahawkins.com/buildout/google-waltham-cross/}},
  note = {Data: Epoch AI, ``AI data centers'', CC BY 4.0, retrieved 2026-10-22}
}

The data · Epoch AI

Epoch AI, 'AI data centers'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/data/ai-data-centers' [online resource]. CC BY 4.0.

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Power over time

facility power · 3 milestones

Every milestone

1 Jan 2024 — Land clearing begins (Sentinel-2 imagery).
1 Sep 2025 124 MW Building complete and operational; full buildout reached. Sentinel-2 imagery shows the building finished with components installed and cars in the car park. Confirmed by Google's official blog post announcing the Waltham Cross data centre opening (https://blog.google/company-news/inside-google/around-the-globe/google-europe/united-kingdom/waltham-cross-data-centre/).
23 Apr 2026 124 MW Full buildout reconfirmed via high-resolution Pléiades-Neo satellite image; no capacity change since September 2025.

Wind made 33% of the power in United Kingdom

share of generation · Oct 2025 to Sep 2026

United Kingdom World

Gas 30% against 21% for World
Coal 0% against 33% for World
Other fossil 2% against 3% for World
Nuclear 12% against 9% for World
Wind 33% against 9% for World
Solar 7% against 10% for World
Hydro 2% against 14% for World
Bio & other 14% against 2% for World

Fossil 32% (−3 pts on a year earlier) · nuclear 12% · renewables 56% · 208 g CO2e per kWh, life cycle · Oct 2025 to Sep 2026. Generation for all of United Kingdom, without imports; the data does not show which grid feeds the site. Every country behind an AI site.

Sources

selected by Epoch AI

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Cheshunt. Grid: Ember, “Monthly Electricity Data and Yearly Electricity Data”, CC BY 4.0, retrieved 11 Oct 2026; shares computed here. All sources.