Increasingly, cities are facing the negative effects of climate change and are struggling to adapt. However, their adaptation strategies often do not work according to the plan and expectations of communities, because citizens and stakeholders are not sufficiently involved in their development. The Interreg CICADA4CE project assists cities in designing and implementing an effective climate change policy, based on the concept of adaptation through ecosystem services and community-based activities. With the support of the Interreg CICADE4CE project, communities including citizens, entrepreneurs, public administrations, institutions and others are working together to create and implement proposals for improving public urban spaces in the context of climate change, in an environment we call Urban Living Labs (ULL). Communities are involved in living labs from the origination of an idea or identification of a problem, through suggestions of possible solutions, their selection to implementation and evaluation.