9th edition of the climate solutions contest

A national and national competition, free of charge, open to all professionals from the construction sector. Submit your sustainable buildings, districts, and infrastructures to show your know-how and contribute to the fight against climate change.



This contest is the concrete embodiment of all statements on ecological transition: it promotes already existing solutions, integrated into buildings, districts and infrastructures.
Thanks to a worldwide communication plan, each participant – candidate, partner or jury member – will benefit from enhanced visibility among peer professionals and become a source of inspiration. In 2020-2021, the contest generated 2.5 million of views at international level. 
Register for the 2022-2023 edition! See regulations
You want to participate in this collective initiative? Join as a sponsor or media partner! Contact us at info[at]construction21.org

One contest, three categories


Office buildings, housing, schools, public building, etc., new or renovated, and already delivered.


City blocks, eco-districts, urban areas, campuses, hospitals, etc., totally or partially delivered.


Projects and services related to sustainable city solutions: green energy, water cycle, shared gardens, responsible mobility, circular economy, etc.


Key steps of the contest



With the support of