We are in a time of transition that demands diverse approaches and regenerative pilot work to disrupt damaging trajectories. The reality of climate change, the need for sustainable practices, and the key social contributions from interested organisations should be normalised, or even legislatively mandated. Yet in the UK, the ongoing housing crisis leaves little room for altruistic approaches by residents, organisations, or citizens. Housing for Good (HfG) is a design-led charity concept that makes volunteering and community development more accessible. It presents citizen-led, place-based actions framed through in-progress legal terms. At the time of writing, 131,140 households in England were in temporary accommodation, a 12-percent rise from the previous year, with 169,050 children among them. At the same time, volunteering is declining, with recruitment becoming harder, and wider community engagement being constrained by time and finances. Citizens clearly have the will to act, but are limited by capacity and circumstance. Against this backdrop, the paper asks: how can legal contracts be re-designed to ‘fail-to-safe’, defaulting to security and mutual benefit when stress-tested? Three guiding questions frame our inquiry: (1) which legal instruments best support housing for the public good; (2) how can contractual clauses embed social and ecological safeguards; and (3) how can design methods translate complex legal language into accessible, enforceable agreements? We position design as a practice with a duty of care that extends beyond financial gain, one that mitigates harm, empowers others, enables accessible reform, and supports regenerative futures. This work directly aligns with the conference track offering new ways to explore; how design can foster spatial justice, care, and resilience and, secondly, the position of the Housing for Good proposition rethinks the notion of dwelling in response to crisis, migration, and systemic inequality… Work navigates systems creation and provides place-based responses for resilience. Overall the HfG proposition can be translated into different fields; opening-up territories of place-based entrepreneurship for the benefit of Ecological Citizen(s). We draw on Ecological Citizenship as a framework for rediscovery, helping communities navigate sustainable origins and forge new pathways. The Ecological Citizen(s) Network+ aims to catalyse transitions by providing autonomy and accessibility to initiate sustainable conditions. Here, legal prototyping becomes a vehicle for Ecological Citizenship, embedding rights, duties, and community benefit into housing governance. Methodologically, our work combines design workshops, legal design, and iterative prototyping. The methodology treats legislation as simultaneously speculative and practical. Our approach includes legal prototyping, stress-testing agreements against breakdown scenarios, multi-stakeholder translation workshops, and algorithmic drafting utilising legal-AI tools to ensure clarity, modularity and public accessibility. Co-design with solicitors and community practitioners, speculative mapping of legal futures, and prototyping of template contracts position designers not only as artefact-makers but as policy mediators. While our focus is UK-based due to funding, the framework is internationally relevant. Contributions include: Housing for Good’s ‘mark’ development and barriers we encountered in the legalese, on the pathway to creating repeatable legal assets. We conclude that legislative systems can be ‘hacked for good’ through open, accessible, community anchored design processes, offering designers a role in reshaping housing, law, and social justice.