The Cost of London Office Space in 2026

London is one of the world’s leading office markets, and occupiers looking for space in the city are facing a difficult market in 2026. The Grade A space most businesses want is scarce and becoming more expensive, and competition for what is available is as strong as it’s ever been.

Starting a search too late can mean your choice of building is limited, fit-out pressures increase and you’re in a weaker position to negotiate.

This guide compares current rents across London and explains how location, building grade and space requirements affect the wider business case for your office. Below, you can jump straight to any section that’s most relevant to your search.

London office market overview for 2026

The office market in London has picked up we’ve moved further into 2026 after a more cautious start to the year. In the most recent quarter, leasing activity across Central London increased – but that demand wasn’t spread evenly across the market.

Around 70% of take-up was for new or refurbished offices, with businesses prepared to pay more for buildings with strong sustainability credentials and capable of housing the kind of workplace experience that can help attract and retain their employees.

London’s AI boom has also made headlines in 2026, and is now an important source of demand in the city. AI occupiers leased over 450,000 sq ft during Q2, bringing the H1 total take-up to in excess of 700,000 sq ft.

For businesses searching for space in London, the market is becoming more selective rather than slowing down across the board. As the supply of Grade A space tightens across the city’s core markets, you should expect prime rents to keep rising – and less room to negotiate on the most sought-after buildings.

West End office space costs

Prime rent: £180.00 per sq ft

The West End continues to command London’s highest office rents, supported by strong demand and an extremely limited supply of Grade A workspace. Businesses are willing to pay a premium for prestigious locations such as Mayfair, St James’s, Soho and Fitzrovia, where high-quality offices remain in short supply.

Office space costs across London’s other key submarkets

Several of London’s other business districts continue to attract strong occupier demand while offering an alternative to the City’s traditional core. King’s Cross has strengthened its position as one of London’s leading technology and AI hubs, with prime rents reaching £97.50 per sq ft.

Southbank remains an attractive option for businesses looking for modern workspace close to both the City and West End, with prime rents of around £90 per sq ft. Meanwhile, Canary Wharf and Docklands continue to offer some of London’s most competitive prime office rents at around £62.50 per sq ft, making the area particularly attractive to occupiers seeking larger floorplates and modern office accommodation

What Grade A vs Grade B space means in practice

Prime, Grade A space typically offers strong energy performance, modern amenities, generous natural light, and layouts that support hybrid working. These buildings help reduce running costs and support talent attraction. Secondary buildings (Grade B) may appear cheaper upfront but often require higher investment in fit out, upgrades or ongoing maintenance. In some cases, total occupancy cost ends up significantly higher than anticipated.

Leasing activity across London

Leasing activity across Central London remained resilient through the first half of 2026, with demand continuing to concentrate on high-quality buildings. Q2 2026 take-up reached 2.9 million sq ft, up 23% quarter-on-quarter and 26% year-on-year, pushing H1 volumes to 5.5 million sq ft. This was above both the five-year H1 average of 4.8 million sq ft and the 10-year H1 average of 5.4 million sq ft, indicating that occupier demand remains healthy despite a more cautious start to the year.

Vacancy sits at approximately 7%, but the distribution of available space tells the real story:

• 70% of H1 take-up was in Grade A accommodation.
• Over 70%% of available supply is Grade B space, where demand remains weaker.

This reinforces the two-speed market, with best-in-class buildings attracting the strongest demand while older stock continues to face greater competition.

What’s driving office costs?

Office costs are influenced by a combination of market demand, the availability of high-quality space and broader economic conditions. While leasing activity has become more measured during 2026, competition for the best offices remains strong, continuing to support rental growth across many of London’s key business districts.

Occupier demand and workplace expectations

Technology, AI, financial services and professional services continue to drive demand. Many are looking for offices with strong sustainability credentials, modern amenities and flexible layouts that support different ways of working.

These features usually come at a premium, but rent doesn’t tell you the whole story. A newer or comprehensively refurbished building may require fewer upgrades during fit-out and could be more efficient to operate. An older office may cost less to lease but require greater investment to meet your expectations for energy performance, technology and employee experience.

Development pipeline and supply conditions

London’s development pipeline continues to tighten, and this remains one of the defining constraints for occupiers in 2026. Recent market data shows that around 13.2 million sq ft of office space is currently under construction across Central London, with approximately 31% already pre-let or under offer. This continues to limit the amount of high-quality space available on the open market and supports competition for the best buildings.

The imbalance is particularly pronounced in the premium office market. New and comprehensively refurbished buildings continue to account for the majority of leasing activity, while around 72% of available supply is older Grade B stock, where demand remains significantly weaker.

Refurbishment therefore continues to play an important role in bringing high-quality workspace back to the market, helping landlords improve building performance, amenities and employee experience. However, the development pipeline remains constrained, with recent market forecasts suggesting London could face a 10 million sq ft shortfall of new and refurbished office space by 2030 if current delivery rates continue.

For businesses, this means the window of opportunity remains relatively narrow. While overall vacancy appears healthy, the availability of the highest-quality office space is considerably lower, meaning the best buildings continue to let quickly.

Occupier priorities also continue to evolve. Businesses are placing greater emphasis on workplaces that support collaboration, employee experience and sustainability, while technology, AI, financial services and professional services remain key drivers of demand. As competition for the best buildings intensifies, many occupiers are broadening their search into neighbouring business districts where high-quality space offers greater availability.

For tenants preparing for a move, renewal or consolidation, the key themes for 2026 are clarity, timing and preparation. Early engagement offers far more control over cost, choice and design outcomes, while detailed workplace analysis helps ensure that the space you select genuinely supports productivity and culture.