London’s big property deals of 2026 and what they reveal

London’s biggest commercial property deals of 2026 point to a market where capital is returning, but selectively: buyers are paying up for prime, well-located buildings with secure income or clear redevelopment potential. The £291 million sale of BP’s St James’s Square headquarters, Barclays’ £750 million deal for its Canary Wharf tower and the marketing of Moody’s City office at around £330 million are the clearest examples so far this year.

Yet headline transactions sit alongside overall volumes that remain below long-run norms. Investors, in short, are back for the best assets in the capital, while the wider office investment market is still recovering.

One St James’s Square: Czech capital takes a West End landmark

In late August, Mayer Brown announced it had advised on the sale of One St James’s Square, the London headquarters of BP, to KKCG Real Estate Group for £291 million. The seller was Lifestyle International Holdings, the Hong Kong investor that bought the building from BP for £250 million in 2020 under a sale-and-leaseback arrangement. The law firm described it as one of the largest West End property transactions of the year.

KKCG, the investment group founded by Czech businessman Karel Komárek, is buying for the long term. According to Mourant, which advised the buyer, BP is expected to vacate in April 2028, after which KKCG intends to deliver a consented Foster + Partners scheme of around 120,900 sq ft of prime offices. The purchase forms part of a strategy to build a portfolio of prime central London offices.

Barclays secures its Canary Wharf home for £750 million

The year’s largest single office transaction so far came at the end of June, when Canary Wharf Group confirmed that Barclays had acquired a 999-year leasehold interest in One Churchill Place, its global headquarters since 2005, for £750 million. The building provides more than one million sq ft of workspace, and the bank’s existing lease had been due to run to 2039.

Savills’ research on the City and Docklands market noted that the deal reflected a notional net initial yield of 5.62 per cent and was the largest office transaction there since March 2022. It also highlighted a broader trend of owner-occupiers buying the buildings they use. Barclays said it expected the purchase to be broadly neutral to its capital ratio and earnings.

Moody’s City office tests appetite for trophy assets

In mid-September, Bloomberg reported that 10 Gresham Street, home to Moody’s in the City of London, had been put up for sale at roughly £330 million, with CBRE appointed to handle the process. The building was bought in 2012 by a Malaysian state pension fund for £200 million and is managed by CBRE Investment Management. Bloomberg framed the sale as a test of investor demand for trophy real estate in a market where transactions had cooled.

The asset arrives with a strong leasing story. In August, CBRE Investment Management announced full occupancy of the refurbished 251,000 sq ft building after MetLife Investment Management took the final floor on a ten-year lease. Moody’s had earlier committed to more than 110,000 sq ft there for its European headquarters.

Other notable 2026 transactions

Below the headline deals, Knight Frank’s London office research for the second quarter recorded several significant West End and City sales, including:

• Stirling Square, SW1 — bought by Deka for £215 million;
• 14 St George Street, W1 — acquired by the Brennan Family for £170 million;
• The Point, W2 — purchased by Generali for £125 million;
• 19–21 Old Bond Street, W1 — sold to Titan Investors for £92.5 million;
• 55 Old Broad Street, EC2 — a consented development site bought by Ashby Capital from Landsec for £63 million.

The spread of buyers, from German and Italian institutions to private families and development specialists, suggests that demand is not confined to a single type of investor.

What the numbers say about investor appetite

Market-wide data counsels caution. Cushman & Wakefield figures reported by Property Investor Today put central London office investment at £2.06 billion in the second quarter and £4.02 billion for the first half, about 15 per cent below both the first half of 2025 and the five-year average. Prime yields held steady over the quarter.

The occupier side looks stronger. The same data showed space under offer reaching its highest level since 2007, while CBRE has pointed to rapid growth in leasing by artificial intelligence companies. For investors, rising occupier demand for high-quality space supports the case for prime assets such as 10 Gresham Street and redevelopment plays such as St James’s Square.

Key takeaways

The 2026 deal flow suggests London commercial property is moving through a selective recovery rather than a broad rebound. Large, well-let or redevelopable buildings in core locations are attracting international and owner-occupier capital, while overall volumes remain subdued. Whether the Moody’s building achieves its guide price will be an important indicator for the rest of the year. Investors considering the sector should take independent professional advice.

Frequently asked questions

Who bought BP’s London headquarters at One St James’s Square?

KKCG Real Estate Group, part of Karel Komárek’s KKCG, bought it from Lifestyle International Holdings for £291 million in 2026. BP is expected to leave in April 2028, after which a consented redevelopment is planned.

What is the largest London office deal of 2026 so far?

Among the transactions reviewed here, the largest is Barclays’ £750 million acquisition of a 999-year leasehold interest in One Churchill Place, Canary Wharf, announced on 30 June 2026.

Has the Moody’s building at 10 Gresham Street been sold?

At the time of writing, there was no confirmed sale. Bloomberg reported in September 2026 that the building had been put on the market at around £330 million, with CBRE handling the process.

Sources

• Mayer Brown advises on the sale of former bp headquarters (Mayer Brown, August 2026)
• Mourant advises KKCG Real Estate Group on £291m acquisition of 1 St James's Square
• Barclays acquires Global Headquarters at One Churchill Place from CWG
• Moody's City of London Head Office on Sale for £330 Million (Bloomberg)
• CBRE IM achieves full occupancy at 10 Gresham Street
• Central London office space under offer hits 19-year high (Property Investor Today)