The aim of this article is to critically situate co-production methods such as that of the urban living lab within contemporary planning theory and in particular to the ideas of ‘agonistic planning’ and the ‘trading zone’. By critically review relevant literature and discussing the results of an ongoing interdisciplinary project, we will show a number of potentials and issues when translating the urban living lab idea to planning contexts. Potentially our urban living labs have opened up opportunities for local planners to discuss controversial issues by using the idea of nature based solution as a boundary-object/trading-zone. On the other hand, planners’ positivistic and incremental understanding of city making hinders a transformative understanding of the urban living lab and nature based solution in favour of more fashionable technological fixes.