This study assessed the infrastructures in public secondary schools on the Mainland, Lagos State. The purpose of this study is to investigate the state of the school infrastructures, the maintenance schedule implemented by school administrators, the factors responsible for quick depreciation of school infrastructures and the roles of school administrators in the management and maintenance of school infrastructures. This study reviewed some literatures on how school infrastructure affects student’s learning outcomes and identified key parameters that informs the design project of educational infrastructure. This study adopted the ex-post-facto research methodology. Case studies and oral interview are used as instruments for data collection, using 30respondents from three public secondary schools selected by stratified sampling technique. Data collected from the field work are analyzed using SPSS to obtain the mean values of the variables, and the results show that infrastructures in public secondary school in Lagos Mainland are variably in a state of disrepair. It further shows that the routine maintenance carried out on school infrastructures are generally inadequate. It was revealed that the factors responsible for school deprecation of school infrastructures include excess pressure on available infrastructures and delayed maintenance amongst others. The roles of school administrators in the management and maintenance of school infrastructures include periodic inspection and decentralization of maintenance. This study recommends that school administrators, teachers and students should exhibit discipline and good maintenance culture, government should have adequate budget for effective maintenance and management of school infrastructures.

Keywords : School infrastructures, decentralization, periodic inspection.