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The year 2021 was marked by developments in legislation and case law regarding procedures for public participation in environmental decisions. First of all, once again, the constitutionality and conventionality of the public’s right to participate was questioned with regard to article 7 of the French Environmental Charter and article 6§4 of the Aarhus Convention. Furthermore, public debate and concertation procedures were modified without significant changes to the existing law. Lastly, the public enquiry mechanism remained relatively unchanged. Nevertheless, administrative case law clarified the impact of public inquiries on urban planning documents: as long as they do not affect the relevance of the opinions issued or the public’s access to information, modifications can be made before and after the inquiry and can even strengthen the efficiency of this participatory procedure.