Abstract
This study examines the contributions of PPPs to sustainable infrastructure development in selected Local Government Areas and tertiary institutions in Imo State, focusing on funding models, regulatory adherence, public and private roles, and socio-economic impacts. A descriptive survey design was adopted. Purposive sampling was used to select relevant ministries and tertiary institutions. Two structured questionnaires were administered to ministry officials and tertiary institution heads monitoring PPP projects. Data were analyzed using descriptive statistics with R. The study identified PPPs in housing (shopping complex), oil (modular refinery), and energy (virtual-pipeline CNG), as well as tertiary institution projects in FedPoNek and IMSU. Funding was found to be mainly private (loans/equity), with lease and concession models common in institutional projects. Regulatory adherence was uneven; public agencies provided key non-financial enablers such as land and permits; private partners contributed technical and financial capacity though some projects faced technical delays. Socio-economic benefits included job creation, revenue generation, and improved services. PPPs in Imo State show promise for sustainable infrastructure delivery, but long-term viability depends on harmonized regulation, stronger institutional capacity, clearer risk allocation, and transparency in financing.