There is increasing clinical interest in mapping cerebrovascular reactivity (CVR), the response of cerebral blood vessels to a carbon dioxide stimulus. However, the application of CVR mapping varies greatly across sites due to a lack of methodological standardisation. We established an international network of over 100 researchers and administered a survey to establish current practice. Guided by QIBA and UPICT protocols, we developed a framework for reaching consensus, and identified areas where agreement already exists. Immediate achievable targets and long-term aims for the CVR community are defined, with the ultimate goal of establishing CVR as a robust clinical imaging marker.