IMPACT OF CORRUPTION ON CONSTRUCTION PROJECT COSTS IN OSUN STATE, NIGERIA

This study examines the impact of corruption on construction project costs in Osun State, Nigeria. The objective is to identify the major causes of corruption, evaluate their effects on project delivery, and recommend strategies to improve transparency and accountability in the construction sector. Data were collected using structured questionnaires designed with Google Forms and distributed electronically to construction professionals in consulting, contracting, client, and government organizations through email and social media platforms such as WhatsApp and LinkedIn. A total of 185 questionnaires were distributed and all were retrieved, representing a 100% response rate, which was adequate for analysis. The data collected were analyzed using descriptive statistical tools, including frequency distribution, percentages, and the Relative Importance Index (RII). The study identifies collusion between contractors and government officials, lack of transparency in procurement processes, and a culture of bribery as the major causes of corruption in construction projects. These practices increase the cost of doing business, discourage infrastructure investment, and reduce value for money in project procurement. Corruption also leads to project delays, poor quality work, and compromised project standards, which negatively affect overall project success and sustainable development in the construction sector. The study recommends digitizing project reporting and approval processes, improving transparency in procurement systems, and strengthening monitoring and accountability mechanisms to reduce corruption. Implementing these measures will help improve cost control, project quality, and timely delivery of construction projects in Osun State.