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The BIG Biodiversity Challenge is now open for submissions

The BIG Biodiversity Challenge invites you to join the movement to protect and enhance biodiversity in the built environment.

Enter the 2024 Awards


1. Choose the relevant award categories relating to your biodiversity enhancements.


2. Nominate a Biodiversity Champion (2 categories to choose from). 

3. Download & complete the Project Entry Form and the Champion Entry Form.

4. Return the submission forms to The submission deadline is 5:00PM on 24 May 2024. A shortlist will be announced  following the judging process due to be completed in July 2024.


The BIG Biodiversity Challenge Award ceremony

The winners will be announced at the #BIGAwards ceremony in September. Full details will be announced in due course.


Sponsorship opportunities:

To discuss packages still available, please email 


Join the conversation: Follow us on Twitter: @BIGbiodiversity and LinkedIn: CIRIA and use the hashtags: #BIGChallenge & #BIGAwards.

Categories and guidelines:


Please refer to the 2024 Award categories page for more information about this year's awards. Please note:


  • There are 11 award categories this year and each enhancement can be entered into two categories. 

  • Judges will select an overall winner for the enhancement (projects only) that demonstrates an outstanding commitment to biodiversity.

  • The awards are free to enter.

  • In order to be eligible for the BIG Biodiversity Challenge 2023, your project must have been completed in the 24 months up to and including 24 May 2024.

  • For the Biodiversity Legacy Award the programme should have been in place for at least 12 months up to and including 24 May 2024.

  • Judges Criteria can be found here


Key dates:

  • 24 May 2024 - BIG Biodiversity Challenge 2024 closes for entries.

  • July 2024 - Awards shortlist announced following Judging Day. 

  • 25 September 2024 - BIG Biodiversity Challenge Awards ceremony.


Further information:

If you would like more information about the 2024 BIG Biodiversity Challenge and Awards please email CIRIA

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