Community engagement is central to achieving affordable and sustainable housing, serving as a transformative practice shaping both the built and lived environments. Drawing on the work carried out in RE-DWELL, this chapter presents community-led housing and public space initiatives—including cohousing, cooperatives, and neighbourhood commons—as examples of how residents co-produce social, spatial, and ecological infrastructures. Through the project’s activities, transdisciplinary engagement was operationalised via iterative co-creation, shared vocabularies, case libraries, and participatory tools. These methods enabled researchers and stakeholders to navigate diverse knowledge systems, negotiate values, and address complex socio-spatial challenges. Participatory and situated learning frameworks equipped early-stage researchers with boundary-spanning competences such as systems thinking, reflexivity, and ethical responsiveness, preparing them to co-produce knowledge with communities. Ultimately, sustainable and just dwelling arises from the integration of housing, public space, social relations, and learning processes—where engagement is not a supplementary practice, but the foundational infrastructure of research, education, and urban practice.

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