Central Londons office market has always been a key part of the city’s economy and some buildings are true giants in terms of size, presence, and influence. Heres a quick breakdown of the five biggest office buildings in Central London right now, based on total square footage and commercial significance.

22 Bishopsgate

Standing tall in the heart of the City, 22 Bishopsgate is the tallest building in the Square Mile and currently the largest office building in the UK by floor area. It offers around 1.275 million sq. ft. of office space and is designed as a vertical village with wellness spaces, bike parks, food markets, and flexible work zones. Its owned by AXA IM Alts and a consortium of investors, and sets the tone for modern workspace expectations.

The Leadenhall Building (The Cheesegrater)

Right next door, The Leadenhall Building, nicknamed The Cheesegrater, offers around 610,000 sq. ft. of premium office space across 45 floors. Its owned by British Land and Oxford Properties and attracts major financial and legal tenants. With its distinctive tapering design, it’s not just large in space, but iconic on the skyline.

Broadgate Tower

Part of the larger Broadgate Estate near Liverpool Street, Broadgate Tower is a 35-storey building with around 430,000 sq. ft. of office space. Developed by British Land, its home to finance, insurance, and legal firms. Broadgate as a whole continues to be a core hub for City businesses looking for scale and connectivity.

One Canada Square

Although it sits in Canary Wharf, it remains a key part of Central Londons commercial footprint. One Canada Square was once the tallest building in the UK and still offers around 1.2 million sq. ft. of Grade A office space. Its owned by Canary Wharf Group and remains central to London’s financial ecosystem, housing a range of global institutions.

100 Bishopsgate

A newer addition, 100 Bishopsgate is another large-scale office tower, offering over 900,000 sq. ft. of space. Completed in 2019, it’s already home to major firms like Jefferies and Freshfields. Developed by Brookfield and managed by CBRE, it combines scale with flexibility and modern amenities.

These five buildings arent just large; they’re strategic. They anchor business districts, shape tenant expectations, and drive the evolution of the London office market. In a post-COVID world, where flexibility and experience matter more than ever, these buildings represent where the market is heading.