Maintenance of classrooms in education has been significantly linked with the principal's effectiveness and students' quality of education. It contributes to mitigating the mass-level failure of students in examinations, which indirectly causes a waste of resources and public expenditure for imparting formal education in schools. This paper is intended to shed more light on the relationship between classroom maintenance and administrative effectiveness in junior secondary schools in Sokoto state. This paper examines the relationship between classroom planning and administrative effectiveness in junior secondary schools in Sokoto State. It determines the relationship between classroom management and administrative effectiveness in junior secondary schools in Sokoto state. A quantitative research design was used, where a measuring scale questionnaire was used for data collection and analysis. The participants in this study were randomly selected from junior secondary schools within the metropolis using simple purposive techniques. The findings indicated a positive low index of .223 and a significant value relationship at 0.05 levels between classroom management and classroom planning and administrative effectiveness in junior secondary schools in Sokoto. It was found out that the majority of the participants indicated that they daily plan their classroom activities before the commencement of the lesson and also manage the student activities throughout the day, which gives the principal a chance to improve their effort in maintaining the school properly. This study will help the concerned authority emphasize proper SC maintenance using different strategies. Keywords: Classroom Maintenance, Administrative effectiveness, Secondary School