This dataset consists of data on the positions of political parties on various environmental scales in 25 European countries. The expert survey was administered between June and July 2024 to 285 experts on political parties and environmental politics. It is being made public for research use. The EPES expert-level.csv files provide raw data at the respondent level. Note that in the expert-level dataset, responses from Latvia, Slovenia and Portugal are excluded due to the low number of responses gathered from these countries. The EPES party-level.csv files provide averaged expert positioning for each party.