Decarb City Pipes 2050 showcased how local authorities can build the capacity to tackle heating and cooling. Seven cities – Bilbao, Bratislava, Dublin, Munich, Rotterdam, Vienna, and Winterthur – joined forces to learn from each other and elaborate innovative responses together. These cities – ranging from frontrunners to beginners – built up skills in the collection and use of data, and the design and deployment of planning tools and instruments and explored transition pathways suitable for their local challenges. They also identified technically and economically feasible technology options and built internal know-how on process and transition management.