Urban areas are facing multiple environmental challenges due to urban increased soil sealing, exacerbating the consequences of climate change in the urban water cycle. Stormwater events favour the risk of flooding, while drought periods may represent water scarcity in most vulnerable regions. Urban Nature-based Solutions (NbS) are being addressed as key elements to enhance urban resilience and stormwater management, through rainwater harvesting and storage for non-potable uses. Blue green roofs, are the most common example that have been developed to promote rainwater retention on urban building’s rooftops. However, since buildings wall area far exceeds roof area, the combination of green walls (GW), a vertical urban NbS for buildings facades, with water storage, stands out with a significant potential to contribute to stormwater management in cities, through both rainwater retention and use, and runoff delay to drainage systems. Besides, GW contribute to other urban environmental benefits such as air quality improvement and mitigation of urban heat island effect. Until the moment, studies on the water management are mainly focusing on the potential of GW to treat greywater with the aim to reuse that water on the building itself, as a way to decrease potable water demand in non-potable uses. The present work aims to review the contribution of GW to stormwater management on highly impermeable areas, through their capacity of rainwater use, identifying existing case studies of GW in rainwater management, summarizing the main key design characteristics that influence their operation.