Barcelona, Spain, is facing a significant housing crisis characterized by rising rents and limited social housing. In response, Catalonia is reimagining its housing system to prioritize affordability and sustainability. The region's approach recognizes housing as a human right and aims to address social inequalities exacerbated by the current geopolitical climate and rising energy costs. Initiatives like Casa Bloc, restored by the non-profit housing association Hàbitat3, showcase how affordable housing can incorporate sustainability features while providing social support for vulnerable families. In Sitges, an eco-housing scheme offers rentals at €6 per square meter, significantly lower than the average rent in Barcelona, which is €1,193. Collaborative efforts through networks like Cohabitac, which manages around 5,000 affordable homes, highlight the importance of public-private partnerships in addressing the housing crisis. Despite challenges such as high land values and rising construction costs, Catalonia's commitment to a just transition in housing aims to decarbonize the urban environment while enhancing community resilience and wellbeing. The model demonstrates that embedding human rights in housing policy can unlock social-economic change and contribute to climate resilience.