Community-driven development (CDD) projects in Kenya face persistent sustainability challenges, particularly following the withdrawal of external funding. Feedback mechanisms the structured channels through which stakeholders communicate concerns, share inputs, and receive project updates are widely recognised as critical enablers of adaptive management and long-term project viability. This article examines the effect of feedback mechanisms on the sustainability of community-driven projects in Kiambu County, Kenya, with a focus on the GRAFCO Savings Co-operative Society Agri-Business Value Chain Hub Project. The study is theoretically grounded in Stakeholder Theory, Social Capital Theory, and Resource Dependence Theory. A descriptive survey design was employed, with structured questionnaires administered to 523 respondents drawn from 24 community-driven projects. Data were analysed using SPSS version 30, employing descriptive statistics, Pearson correlation, and regression analysis. Findings indicated that feedback mechanisms demonstrated a moderate positive correlation with project sustainability (r = 0.38, p < 0.01) and were a statistically significant predictor of sustainability in the multiple regression model (β = 0.136, p = 0.030). Regular stakeholder meetings and competent follow-up visits were identified as strengths, while the lack of clear and accessible communication channels was the most critical weakness. The study concludes that while feedback mechanisms contribute meaningfully to sustainability, their impact is optimised when integrated within comprehensive stakeholder engagement frameworks anchored by strong project planning. Recommendations are offered for implementers, policymakers, and future scholars.