The evaluation of the environmental benefits of NbS is one of the key solutions paving the way for resilient cities, and to strengthen urban planning strategies. A strong need of new governance, business, financing models and economic impact assessment tools for sustainable cities with NbS (urban re-naturing) was identified by the European Union. Within this context, the guidance provided in this synthetic and condense document is aiming to acquire, arrange and assess relevant data sequences to understand the value of Nature Based Solutions in a dynamic and proactive manner, under study in the context of a progressive perspective. Additionally, there is a need for continuous monitoring of NbS following a robust methodology.