This study, titled “the impact of mixed land use planning (MLUP) in Addis Ababa: socio-economic, physical, and environmental effects,” aims to assess the effectiveness of MLUP in addressing urban challenges such as overcrowding and service disparities. The research identifies significant gaps in the current implementation of mixed-use development in the city. Employing a mixed-methods approach, the study involves qualitative interviews with 14 key informants and 40 planners, complemented by quantitative surveys of 384 residents from four districts: Main City Center, Main Corridor, Secondary Corridor, and Around Goru Junction. Findings indicate a general consensus among planners regarding MLUP’s potential, yet residents’ express dissatisfaction with its economic contributions and the lack of regulatory clarity, raising concerns about sustainability. Additionally, travel patterns reveal reliance on taxis, suggesting inadequate transportation infrastructure. The study concludes that effective MLUP requires enhanced regulatory frameworks, improved transportation integration, and stakeholder engagement. These insights provide actionable recommendations for urban planners and policymakers, emphasizing the importance of balancing land uses to promote sustainable urban growth and enhance livability in Addis Ababa. Future research should further explore community engagement and the socio-economic implications of MLUP.