With Q4 2025 now well underway, we’ve compared our recent enquiry data with the trends we saw in Q3. Our research demonstrates a shift in occupier behaviour with enquiries for Grade A office space rentals rising by 25% during Q3 2025. So far, our Q4 enquiry activity suggests continued demand for premium workspaces.
Why are enquiries for Grade A office space in London rising?
Enquiries for Grade A office space are rising as businesses prioritise quality, sustainability and employee satisfaction.
According to our research, over 80% of take-up in London across Q1 to Q3 was for Grade A office space. This covers traditional leased spaces and serviced offices and highlights the market-wide preference for quality-led workspaces.
With more firms operating hybrid work models, businesses expect their offices to be worth the commute. This often means better amenities, advanced technology and modern design features.
Several of the serviced offices we market offer plug-and-play setups with premium facilities. Clients we work with tell us that this quality helps to attract and retain employees, making Grade A space a worthwhile investment.
Many firms in London also expect the office space they rent to be ESG-compliant. New Grade A workspaces are often more environmentally friendly and energy-efficient, helping companies meet their sustainability targets.
These preferences are reflected in the growing demand for Grade A office rentals.
Where did Grade A office rental demand increase during Q3 2025?
Across both the traditional and service office sectors, the demand for Grade A workspaces was highest in London’s premium submarkets. These locations typically offer a greater supply of modern, high-spec buildings.
In the traditional leased market, these areas showed a clear increase in demand for premium office space.
• West End: Grade A fitted spaces rose to around £100 to £200 per sq. ft., with Mayfair and St James’s consistently exceeding the £200 mark.
• City of London: Grade A rents in Q3 were up from Q1 and Q2, ranging from around £75 to £130 per sq. ft.
• Midtown: Grade A fitted rents ranged from £60 to £120 per sq. ft, with King’s Cross leading demand and achieving top-end figures.
Our research shows that vacancy rates for Grade A spaces in the West End are just below 1.5%, while City Grade A rates are approximately 2-3%.
The serviced office providers we work with in these areas are operating at near-full capacity, and Grade A serviced office spaces in London are particularly scarce.
Q4 2025 so far: Is the popularity of Grade A offices still growing?
At FreeOfficeFinder, our early enquiry statistics suggest that the demand for Grade A office spaces is continuing to grow.
Our data shows that many of the newest Grade A buildings are almost fully occupied, with over a quarter of London submarkets having no Grade A workspace availability.
Our research also indicates that from 2026, Grade A supply in London’s key office markets may run out. However, new developments such as 105 Victoria Street (West End) and 2 Aldermanbury Square (City) will help to ease this strain. As a result, we expect the rise in premium workspace enquiries to continue throughout the rest of Q4.
How Does the Rise in Demand for Premium Workspace Impact London’s Office Market?
This rising demand for Grade A spaces is creating a more polarised London office market. Premium buildings are achieving higher rents and are leasing faster. In comparison, interest in Grade B offices has decreased throughout 2025.
For traditional leased spaces, our findings show that Grade A demand in London is expected to grow by around 4-5%. However, Grade B take-up is predicted to fall by around -2%.
This pattern is also evident within serviced offices in London, indicating a growing pressure on office providers to upgrade their buildings to meet demand for high-quality office space.
What This Means for Businesses Seeking Grade A Office Space to Rent in London
For businesses searching for Grade A workspaces to rent in London, whether leased or serviced, these trends apply to both markets. As demand rises and availability tightens, companies should consider the following:
• The Grade A office market is highly competitive – as shown in our research, many traditional and serviced Grade A office buildings in Central London are operating at near capacity. As a result, companies face strong competition when seeking premium office space to rent.
• Enquiring early is crucial – this competition means companies must act quickly to secure the space they want to avoid disappointment. We can help businesses compare options and negotiate terms, helping make the process quicker and easier.
• High-spec serviced offices offer a flexible alternative to traditional spaces – serviced or managed workspaces offer Grade A quality, plug-and-play setups, and reduced upfront costs, often allowing businesses to move in more quickly.
• Refurbished Grade A offices will also see increased demand – businesses are prioritising quality-led fitouts, premium facilities, and ESG-compliant buildings. We expect demand for refurbished Grade A leased and serviced spaces to rise through Q4 and into 2026.
Our latest data highlights the growing demand for premium office space, with enquiries for Grade A workspaces rising by 25% in Q3 2025. Early enquiry behaviour in Q4 confirms that this demand remains high.
With rising rents, low vacancy rates and a growing pressure on both serviced and traditional Grade A supply, the market reflects a clear flight to quality.
At FreeOfficeFinder we will continue monitoring our enquiry data throughout Q4 and into 2026 to track how this trend develops and understand what businesses are looking for when renting office space in London.
