This report is an exploratory study on scaling up and scaling out the GEF SGP community-based adaptation (CBA) project, implemented by UNDP. Using Namibia in sub-Saharan Africa as a case study, this report identifies which processes used and results obtained are effective, and therefore hold the most potential for going-so-scale both in terms of scaling up (influencing higher level policy and in-country decision-making by mainstreaming community level planning and adaptation practice to climate change into national planning and programming systems) and scaling out (the horizontal expansion and replication of successful CBA within countries and between communities from local to national scale, as well as across national boundaries). A comprehensive roadmap for scaling up and out successful CBA project practices is included.