The report first introduces some general comparative remarks about the Nordic legal systems and environmental law and decision-making. Thereafter, the study and its parameters are introduced (Chapter 1). After this, a brief description is given for each of the countries in the study: Denmark, Norway, Iceland, Sweden and Finland (Chapter 2). Here, general information is given about each country's national law and administration, environmental legislation, environmental administration and decision-making, supervision and enforcement, and finally system for administrative appeal and judicial review. In Chapter 3, some conclusions are drawn from a workshop that was undertaken with representatives from the authorities from all five countries. Here, also a couple of challenges to the permit systems are presented and issues of interest for further comparative studies are discussed. Finally, there are two annexes to the report, containing the minutes from the two workshops that were held as part of the study, the first on 22–23 March 2022 (Annex I) and the second on 22 March 2023 (Annex II).