We are the city-wide collective supporting the development of resilient communities through community-led improvement of buildings, via planned maintenance, retrofit and local heat and energy systems. Edinburgh Building Retrofit and Improvement Collective empowers the local ecosystem of groups working to do these things. A community can be a tenement, a street or a neighbourhood. Working at community-scale offers many advantages and improving whole buildings gives the best results. We develop stronger and more resilient communities in the process.