Small and medium sized cities in Europe and Latin America share a common challenge in implementing nature-based solutions (NBS). Most land is in private hands. In addition smaller cities are not early adopters of NBS and may be too small to grow a market for private providers of NBS. This begs the question: how can municipalities and the public sector more widely enable NBS in the private sector? This report begins to answer this question, targeting public sector policy and planners wanting to enable policies for private sector participation in providing NBS. This includes, for example, professionals in national ministries for environment and planning; municipal planners working on strategies for naturebased solutions (e.g. SUDS), and municipal master planners. Information for the report has been collected through a series of workshops and interviews with planners and businesses within the INTERLACE project.