Green Sky Thinking

Over the past eight years Green Sky Thinking became the leading collaborative platform that showcases honest lessons learned and highlights holistic approaches in sustainability.

Get Involved

Be involved in the UK’s biggest get-together of sustainable city-making professionals.

If you are interested in participating or supporting Green Sky Thinking 2019, please email Katerina Papavasileiou, sustainability projects manager, or Ellie Pile, Green Sky Thinking Assistant,

Our Event Programme

The programme is now live!

From May 14-18, at venues across London, the programme exploring ‘honest lessons learned’ from the capital’s best sustainable city-making projects. These projects, curated by Open City’s GST panel and selected from submissions addressing our ‘people first’ theme, will be led by you: London’s built environment specialists with a passion and expertise in sustainable design.

We hope you can join us for GST this year: as a delegate, as an events runner or as a sponsor.

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Broaden your horizons

Our new 'Voices From The Industry' column explores the latest thinking and practice from the built environment.

Join us on linkedIn and instagram


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This year Green Sky Thinking took place on the 10th -18th May. 

Download the full 2018 programme here.


Green Sky Thinking Launch 2018


Last Thursday evening we launched the Green Sky Thinking programme that kicked off the discussion around our 'people first' theme. Hosted at possibly the best piece of people first city in London, it’s safe to say the location or perhaps their resident animals stole the show.


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High Supporter

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Image provided by

SWIM by Amy Sharrocks, photographed by Ruth Corney // New Ground CoHousing, photographed by Joe Okpako/Tim Crocker // Oasis Farm Waterloo