Leadenhall Street Transformation

Green-blue infrastructure opportunities analysis
London

The Leadenhall Street Transformation represents a once-in-a-generation opportunity to reimagine one of the Square Mile’s most iconic streets — creating a safer, greener, and more resilient environment at the heart of the City of London.

Through the re-allocation of streetscape, the following benefits could be realised:

3.5 million litres of surface water removed from the combined sewer system annually
2,127kg of annual carbon sequestration once the landscape is mature
1–4-degree reduction in street temperature through shading and evapotranspiration
80% average removal of silt, heavy metals and hydrocarbons
Removal of the need to irrigate
Increased air quality and biodiversity

EGY is proud to have supported the City of London Corporation by analysing the outline proposals and leading a blue-green infrastructure opportunities assessment. Our work focused on identifying opportunities for the integration of nature-based techniques such as rain gardens, SuDS tree pits, and other climate-positive measures into the evolving streetscape, delivering lasting environmental and social benefits.

Heat diagram of subsoil infiltration rates along Leadenhall Street.

This transformation is about more than just resurfacing streets — it is about future-proofing the City for the generations to come. Through our detailed analysis and creative input, we have helped ensure that the vision for Leadenhall Street embraces not only connectivity and safety, but also climate resilience, urban greening, and the wellbeing of everyone who moves through this dynamic part of London.

We are proud to have played a role in helping the City seize this rare opportunity to set a new standard for sustainable, people-focused urban design.

  • Leadenhall CGI
  • Leadenhall development