The purpose of the study was to investigate the factors affecting the performance of community-based projects. The purpose of community-based organizations is to plan, monitor and implement social and economic development programs and provide social and economic development. Community based projects are at risk of of poor performance and the study sought to find the factors contributing to this. The main objective of the study was to determine how community participation and project management practices affect the performance of community-based organizations. Descriptive research design was used. The study targeted 50 respondents from the community and employees from Jiamini community-based organization. The sample design used was stratified sample design. The study adopted random sampling technique which used simple random sampling. Data collection was both open ended and closed ended questions. Qualitative data was analysed based on the themes acquired through the questionnaires. Quantitative data was analysed through identification of developing trends that aided in addressing research questions. The study found out that each of the factors including project management practices and community participation and how they significantly affect the performance of CBPs using a case study of Jiamini CBO. These results can form a guideline for the organization along with all stakeholders in the industry in the implementation of CBPs. The significance of the study was to ensure the study is used by researchers and scholars who seek to find these factors as well as organizations that want to ensure that all their programs and projects are successful. The study also ensured that the beneficiaries and community members were able to recognize the role they play in ensuring that these projects are successful.The study recommends increased community participation (78%), and adoption of project management practices (89%) to ensure projects run effectively in the organization and among other NGOs.