Reinventing Cities

Seeking creative minds with a vision for a greener urban future!

Auckland, New Zealand
Cape Town, South Africa
Chicago, USA
Houston, USA
Madrid, Spain
Milan, Italy
Montréal, Canada
Oslo, Norway
Paris, France
Portland, USA
Reykjavik, Iceland
Rio de Janeiro, Brasil
Salvador, Brasil
San Francisco, USA
Vancouver, Canada

A global competition for innovative carbon-free and resilient urban projects

Initiated by the C40 Cities Climate Leadership Group and made possible thanks to the support of Climate KIC and ofo, Reinventing Cities is an unprecedented global competition to drive carbon neutral and resilient urban regeneration.

15 cities have identified together 39 underutilized spaces to redevelop, including several empty plots of various sizes and abandoned buildings, historical mansions, underused markets, a former airport site, car parks to transform, and an abandoned incinerator and landfill.

Through this competition, C40 and the participating cities invite architects, developers, environmentalists, neighbourhood groups, innovators and artists to build creative teams and to compete for the opportunity to transform these sites into new beacons of sustainability and resiliency. They will also have to demonstrate how innovative climate solutions can be achieved in combination with noteworthy architecture and local community benefits.
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Competition kick-off

Start of the first phase

May 31


Deadline for submission of the Expression of Interest



Selection of each site’s finalist teams



Deadline for submission of the Final Proposals


Spring 2019 Selection of the winning projects

Competition closure

Words from Mayors

Climate change and global warming present an existential threat to the human race, and will require a unified global response at all levels of society. Scientists estimate that we are currently on a trajectory that will increase average global temperatures by two degrees above pre-industrial levels by 2100. If these emissions are not appropriately addressed, cities will become increasingly vulnerable to the adverse impacts of climate change.

At the heart of the city lies an opportunity, as urban density presents a greener way of living. Urban density can create the possibility for a better quality of life and a lower carbon footprint through more efficient infrastructure and improved urban planning.

Therefore, cities and private actors must work together to showcase new models for decarbonised development, buildings, and services to households and businesses in hopes for their widespread uptake and adoption.

As Mayors, we are committed with the C40 to move a step forward in our fight against climate change and to organize Reinventing Cities, an unprecedented global competition to stimulate sustainable development and to celebrate innovative solutions to environmental and urban challenges.

We hope Reinventing Cities will set new standards of carbon-neutral and resilient development and will enable the implementation of projects across a wide range of architecture, typology and usage. With this competition, we are calling the private actors to work with us to identify new solutions and to deliver the city of tomorrow, today.
Mayors of the participating cities(Auckland, Cape Town, Chicago, Houston, Madrid, Mexico City, Milan, Montréal, Oslo, Paris, Portland, Reykjavik, Rio de Janeiro, Salvador de Bahia, San Francisco, Vancouver)


  • Nelzair Vianna
    12:57    18 / 12
    Hey check this out @24HoursofReality @ClimateReality @ComplexUrbanSys @c40cities @algore
  • Thomas Bourgenot
    12:56    18 / 12
    Et pendant ce temps, la maire de @Paris, présidente de @c40cities fait un partenariat avec #Total pour rénover le T…
  • FIA Foundation
    11:59    18 / 12
    Read about the latest @TRUE_Emissions Initiative report @thetimes today, looking at the real world emissions on Lon…