Central London Office Space Under Offer Reaches 4.44 Million Square Feet

Central London office space under offer reached 4.44 million sq ft in Q2 2026, according to figures published by Property Investor Today. This represents a 51% quarter-on-quarter increase and marks the highest volume of space under offer recorded in the market since 2007. Alongside this pipeline expansion, completed office take-up in Central London rose 28% quarter-on-quarter to 2.46 million sq ft during the same three-month period.

These metrics measure signed leases and active lease negotiations progressing through legal terms rather than capital values or completed asset transfers. The figures cover transactions across both prime and outer business districts, driven by occupier requirements in the Wider City and Canary Wharf submarkets. Investors must evaluate these figures against broader capital market activity, as operational leasing velocity is currently diverging from asset investment volumes.

Scale of Occupier Activity Versus Capital Volumes

While leasing pipeline figures increased, transaction volumes for physical real estate assets presented a different trend. Property Investor Today reported that Central London office asset transactions totaled £2.06 billion in Q2 2026. This brought total H1 2026 investment volume to £4.02 billion, a figure that sits 15% below the investment levels recorded in H1 2025.

Capital pricing across prime stock has flattened rather than recovered. Data from Cushman & Wakefield showed that prime office yields remained steady across Central London throughout Q2 2026, with prime City yields holding at 5.5%. The disconnect between a 51% quarter-on-quarter expansion in under-offer leasing space and a 15% year-on-year contraction in H1 investment volume indicates that institutional buyers remain cautious, even as corporate tenants commit to floorplate expansions.

Structural Drivers of the Pipeline

The expansion in occupier demand is concentrated within specific corporate sectors. In H1 2026, technology occupiers accounted for 25% of total Central London leasing take-up, according to Property Investor Today. Within that technology footprint, artificial intelligence firms made up nearly 60% of the sector's leasing activity, representing 15% of total market take-up across all industries.

This demand from artificial intelligence occupiers, alongside ongoing negotiations in Canary Wharf and the Wider City, has absorbed large tranches of prime space. The concentration of take-up in these submarkets demonstrates that corporate tenant demand is expanding beyond the historical core of the West End into districts capable of accommodating larger single-tenant requirements.

Market Consequences and Supply Shifts

On our reading, the sustained absorption of space by technology and artificial intelligence firms will accelerate supply tightening for prime Grade A assets, particularly in submarkets receiving major requirements like Canary Wharf and the Wider City. As under-offer space converts to completed leases, available contiguous floorplates in these districts will diminish.

However, capital values face counter-structural pressures from stock removals. The Business Times reported that between 2019 and early 2026, investors purchased nearly 4.0 million sq ft of UK capital office space for conversion into hotel developments. These conversions were triggered directly by falling office valuations during that multi-year period, effectively contracting total office inventory while leasing demand rebounded.

Counterweights to the Bullish Reading

For the thesis of a sustained prime commercial real estate recovery to hold, under-offer space must successfully convert into executed leases without elevated fall-through rates. Because under-offer metrics measure negotiations rather than finalized contracts, a macroeconomic disruption or shift in corporate capital expenditure could stall transactions before completion.

Furthermore, if capital market investment volumes remain 15% below prior-year levels and prime yields hold flat at 5.5%, asset valuations may not track the operational leasing gains. If conversion activity into alternative uses like hotels continues to draw capital away from office acquisitions, secondary office assets could experience further yield expansion regardless of prime occupier demand.

What to Watch

Market participants should track the conversion rate of the 4.44 million sq ft under-offer pipeline into finalized Q3 2026 take-up figures. Subsequent reporting from Cushman & Wakefield on whether prime City yields break from the 5.5% mark in H2 2026 will indicate whether institutional investors are repricing assets to reflect the operational take-up.

Finally, full-year 2026 investment data will show whether total capital volumes can close the 15% deficit established in H1 2026, or whether capital deployment into Central London office stock will remain constrained despite record occupier commitments.