Overview of the Report
The Decidim Activity Report 2025 presents a comprehensive overview of the open‑source participatory democracy platform’s growth across Europe and beyond. Compiled by the Decidim community and made publicly available, the document details installation numbers, geographic reach, and institutional adoption, highlighting the platform’s role in fostering inclusive decision‑making processes.
Pan‑European Reach and Adoption
Decidim has been deployed in more than 500 installations across Europe, spanning municipalities, regional governments, and public institutions. Notable adopters include major cities such as Barcelona, as well as national bodies in France, Germany, and the Netherlands. The report also notes participation from non‑European entities, including New York City and Brazil’s federal government, underscoring the platform’s global relevance.
Sustainable Housing Initiatives
A significant portion of the report focuses on sustainable housing projects that have utilized Decidim to engage citizens in planning, budgeting, and design decisions. Case studies illustrate how participatory budgeting allocated funds toward energy‑efficient retrofits, green roof installations, and the creation of co‑housing clusters that meet EU climate targets. Quantitative data show that, in the reported period, over €120 million was directed to housing‑related sustainability measures through Decidim‑facilitated processes.
Key Performance Metrics
- Total installations: > 500
- Participating public institutions: + 200
- Citizens engaged: ≈ 12 million across all projects
- Housing‑related funds allocated via participatory budgeting: €120 million
- Average project completion time reduced by 18 % compared with traditional procurement cycles
Evidence of Reuse and Impact
The report documents more than 500 instances where existing Decidim deployments were adapted for new contexts, demonstrating the platform’s flexibility. Reuse examples include the integration of climate‑impact assessment tools, modular housing design modules, and real‑time energy consumption dashboards. These adaptations have enabled municipalities to meet EU Sustainable Development Goals (SDGs) related to affordable, resilient, and sustainable housing.
Institutional Collaboration and Governance
Decidim’s governance model is highlighted as a collaborative ecosystem involving developers, civic NGOs, and public administrations. The document outlines the establishment of a public‑institutions committee that includes representatives from Barcelona, New York City, and Brazil, fostering cross‑border knowledge exchange on sustainable urban policies.
Refresh Cycle and Future Outlook
The report follows a quarterly refresh schedule, with the latest update covering Q4 2026. Planned enhancements for the next cycle include deeper integration with climate‑data APIs, expanded multilingual support for pan‑European participation, and tools for monitoring long‑term sustainability outcomes of housing projects.
Technical and Accessibility Features
Decidim is open‑source, licensed under the AGPL, and designed for accessibility compliance (WCAG 2.1 AA). The platform supports modular extensions, allowing municipalities to tailor functionalities for specific housing initiatives, such as energy‑efficiency calculators and transparent budget tracking dashboards.
Conclusion for Sustainable Housing Stakeholders
For a pan‑European audience focused on sustainable housing, the Decidim Activity Report 2025 provides concrete evidence of how participatory digital tools can accelerate citizen‑centered, climate‑aligned housing policies. The documented scale of adoption, substantial financial allocations to green housing, and the platform’s open, adaptable architecture make Decidim a viable resource for municipalities seeking to meet sustainability targets while enhancing democratic engagement.