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Eric Parry's One London to Become UK's Joint Tallest Building by 2033

architecture-design · 2026-06-06

Eric Parry Architects has unveiled One London, a 309.6m, 74-storey super-tall tower in the City of London, set to rival the Shard as the UK's joint tallest building upon completion in 2033. Formerly known as 1 Undershaft, the project is developed by Aroland Holdings and Stanhope, with construction planned to start in 2028. The building will be primarily commercial workspace for 7,000–10,000 people, but features extensive public amenities including an 11th-floor public garden, the highest bar in London, and education spaces operated by the London Museum on the top two floors. Parry emphasized a civic rather than commercial vision for the top, inspired by taking his child's class up the Heron tower. The design incorporates weathering steel 'giant redwood' pillars, passive shading, and a white non-glass facade for longevity. Sustainability targets include BREEAM and NABERS UK ratings, with a 960% Biodiversity Net Gain (Parry claims 1,000%). The building sits at the heart of the Eastern City Cluster, a concept Parry describes as uniquely English, contrasting with Canary Wharf or La Défense. The project evolved over 11 years, post-pandemic, responding to the City of London Plan 2040's need for office space and occupant wellness.

Key facts

  • One London will be 309.6m tall with 74 storeys.
  • Construction starts in 2028, completion in 2033.
  • Developers: Aroland Holdings and Stanhope.
  • Architect: Eric Parry (Eric Parry Architects).
  • London Museum will operate education spaces on top two floors.
  • Includes highest bar in London and 11th-floor public garden.
  • Targets BREEAM and NABERS UK sustainability ratings.
  • Claims 960% Biodiversity Net Gain.

Entities

Artists

  • Eric Parry

Institutions

  • Eric Parry Architects
  • Aroland Holdings
  • Stanhope
  • London Museum
  • Wallpaper*

Locations

  • London
  • United Kingdom
  • City of London
  • 1 Undershaft
  • Eastern City Cluster
  • Canary Wharf
  • Paris
  • La Défense
  • Frankfurt

Sources