Design (as a practice) has a duty of care to society (above financial gain) navigating: consequence mitigation, empowering others, nurturing circularity, cross-fertilising disciplines, ecological restoration, and cultivating regenerative futures. We require diverse approaches, and regenerative pilots, to disrupt damaging trajectories. As Manzini alludes, design should ‘create the conditions’ for others to enact change. Authors see fresh roles for participatory design and social innovation, creating conditions for ‘Sustainable Symbiosis’. The article navigates an Ecological Citizen(s) deployed example with Ealing Borough Council (municipality) exploring citizen-led models. Scenarios leverage ‘micro-interactions’ instances that benefit communities through financial remuneration, creating peer-to-peer opportunities benefiting each other and the planet. Ecological Citizen(s) are intent on ‘creating the conditions’ transcending traditional boundaries activating communities, reshaping relationships and accessibility to ‘catalyse sustainable conditions’... i.e. Sustainable Symbiosis. The work is UK-focused, with international application.