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Cambridge Institute for Sustainability Leadership

HRH The Prince of Wales

We are transforming a 1930s telephone exchange in central Cambridge into a world-leading example of an ultra-sustainable retrofit. Working with our committed project team we have set the highest standards for an existing building, which aims to achieve multiple sustainable building certifications. The building will become CISL's home in Cambridge as well as a virtual hub for its international offices and its global network.  It will also host The Canopy; an Accelerator and Sustainability Hub which will support innovative startups and small businesses. 

With a reputation as one of the most environmentally burdensome industries, the built environment sector needs to find a way to lead the transition to a sustainable economy. We are demonstrating the possibilities through our ambitious retro-fit that will achieve multiple sustainable building standards including BREEAM (Outstanding), the Passivhauss 'EnerPHit' standard, and Well (Gold) certification, alongside the application of 'circular economy' principles which will minimise the volume and impact of man-made resources used in the building. 

We will be sharing the lessons and the journey of this ambitious project in our commitment to support the Built Environment industry to build their knowledge of and capacity for sustainable building practices.   



We are sharing the vision, challenges and progress of the Entopia building with regular
updates from across the project team.


Find out more about the Entopia project in this short film.

Updates & News

Latest updates from site.




As part of our wider events programme we will be sharing updates on the Entopia building .

Building Change 

Find out more about the work we are doing in the Built Enviornment sector. 



The case for retrofitting

“Decarbonising our housing and making all homes affordable, safe and healthy is a massive challenge.. this calls for a radical shift in our thinking and our preparedness to invest in the energy efficiency of our buildings and built environments.” Tim Forman, Senior Research Associate and Deputy Course Director, on the case for retrofitting.

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Sustainability Leadership for the Built Environment (IDBE)

Learn how to implement change and build a sustainable future.

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30 years driving transformative change