The study was carried to critically investigate the analysis of factors influencing material wastage on building sites in Kaduna State. To achieve this objective, three research questions were stated to guide this study. The data collected were analyzed using descriptive statistics, tables and graph to analyze research questions. A structured questionnaire was used as the major instrument for data collection from the respondents in selected Building Companies in Kaduna State. After the careful analysis of the data, the following findings were revealed that; there are major causes of material wastage; there are factors causing the material wastage according to their influence on the budget of the project and there are possible means of reducing the wastage. The study was concluded with some recommendations that monetary incentives should be introduced so that workers get motivated and thereby change their negative attitude to work; and there is need for workers to exercise more care when carrying out their work especially while working with breakable materials such as sandcrete blocks, tiles, ceiling boards etc.