The Nature4Cities social acceptance method is an NbS implementation support tool. This methodological tool aims to study social acceptance (socio-political, community and market acceptance) and barriers (social, economic and cultural) as key factors for the implementation of NbS projects. It is based on a questionnaire that allows for data collection and quantitative evaluation of the social acceptance of an NbS project. Urban planners and decision makers can easily adopt the procedure to assess and manage social acceptability of any type of NbS by the community, the public or the market.