Water resources are increasingly threatened by climate change, overconsumption, unsustainable land use, and inadequate regulations. This project addresses these challenges by focusing on urban areas in the SUDOE region through a circular economy approach. SudWaMa specifically tackles common barriers such as regulatory frameworks, infrastructure investments, technological innovations, and public acceptance. Its main objective is to address the challenges of water consumption efficiency and water quality in institutional buildings. By comparing the regulatory frameworks of SUDOE countries, partners are developing a COMMON STRATEGY on measures to improve water efficiency in institutional buildings, promoting circular economy practices and end-user involvement. Based on a co-creation process, the project brings together R&D&I experts with local and regional authorities, water operators, NGOs, startups, and companies. This intensifies networking, knowledge exchange, and creates new synergies among actors at a transnational level. Furthermore, the project aims to demonstrate the sustainability of circular water management systems and tools at THREE PILOT SITES, including cost-benefit analysis. Innovative solutions for rainwater, greywater, and wastewater reuse are applied. Through scientific publications, workshops, and conferences, the scientific community, institutions, and authorities will engage in dialogue to validate the new solutions. By comparing different participatory awareness approaches and sociocultural factors, the project designs tailored ACTIONS TO INVOLVE USERS in sustainable water management. The innovative aspect of SudWaMa is that it offers diverse, complementary, and interdependent solutions for circular water management. This holistic approach fosters cooperation among all types of actors at a transnational level, providing solutions to build a MORE RESILIENT URBAN SPACE.