Nature-based Solutions (NbS) have been defined many times, but in essence are developing solutions to societal problems using natural processes. Many ways of assessing the potential benefits and disbenefits of these NbS have been put forward and, if these assessment frameworks are to be used for best results, then the most appropriate framework(s) should be identified and recommended to users. This project searched for potential assessment frameworks and carried out a two-stage process to identify the most appropriate framework.