AI Office Leases Surge Tenfold in London, Driven by King's Cross and Microsoft Deal

London’s AI sector is rapidly outgrowing its office footprint. In the most recent month, firms whose core business is building AI models signed leases for over 450,000 sq ft, up from an average of 40,000 sq ft across 2025. The surge represents a ten‑fold increase in just twelve months.

Nearly half of the new space is concentrated around King’s Cross and Euston stations, areas prized for their links to Cambridge and local universities. The Knowledge Quarter at King’s Cross already hosts DeepMind, Google, Meta and Microsoft, creating a dense AI talent cluster.

Patrick Scanlon, senior director of market analytics at real‑estate data firm CoStar, called the trend a “graduation moment” for the sector, emphasizing that demand appears sustainable rather than speculative. He noted that high‑quality buildings with large floor plates are now scarce, even as overall office vacancy remains above pre‑Covid levels.

Microsoft’s recent agreement to lease the eight‑storey, 100,000 sq ft Film House building in Soho adds a marquee tenant to the city’s AI real‑estate landscape. The deal underscores the tech giant’s commitment to maintaining a physical presence in London’s innovation hubs.

A City Hall report estimates that at least one million London jobs are highly exposed to AI, highlighting the sector’s broader economic impact. Despite concerns about job displacement, the influx of AI firms signals confidence in the city’s skilled labour pool, venture capital access and the value of a shared office brand.

What to watch next: whether the surge in AI leasing triggers new construction of purpose‑built AI campuses or prompts a re‑evaluation of flexible‑working policies in London’s premium office market.