Informality and climate risks are defining features of urban life in the global South. This study explores the relationship between willingness to accept (WTA) and willingness to pay (WTP) for green infrastructure as indicators of its acceptability and economic viability for climate resilience in an informal African urban context. A questionnaire-based survey was conducted in Ajegunle, a major informal settlement in Lagos, Nigeria. Findings show that older, more educated and higher-income residents were more inclined to support green infrastructure. Both high WTA and WTP reflect strong perceived climate vulnerability and entrenched informality. WTP exceeded WTA, yet both showed a significant positive correlation, suggesting perceived value and feasibility. The study finds that socio-demographic and perceptual factors shape behavioural intentions, with urban informality exerting more influence than climate vulnerability. To boost adoption, strategies must include education, participatory planning and socio-economic empowerment to bridge the gap between willingness and real engagement.
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