The main purpose of this study was to examine the practices of community building and its challenges in government secondary schools of Nefas Silk Lafto Sub City. To achieve the purpose of the study, survey design was employed, because it was appropriate to investigate what was going on regarding the community building practice and its challenges in the nine government secondary school activities. The study was conducted in government secondary schools in Nefas Silk Lafto sub city. Taking total population technique was employed to get appropriate sources of data. Accordingly, 36 principals and 27 PTSA members were taken as target population. Open ended and closed ended questionnaires were used as data gathering instrument. Percentage, frequency and mean were used to run the data obtained from the questionnaire. The findings have indicated that the practice of community building in government secondary schools contributed a lot in many ways: it made the community participate in resource management; initiating community building, information about school events was given out regularly to PTSA members; PTSA members on their part created smooth communication between the community and the schools and as result quick response to problems encountered in teaching-learning process was gained. The study indicated that the major community building challenges in the government secondary schools were lack of competence of the principals on how to participate the community, parents inconvenience with the meeting time and place, lack of commitment of the principals to work with PTSA and none participatory leadership style of the principals. In the end, the study has come up with the following recommendations: there should be a need to assign principals based on merits; principals should apply participatory leadership style to manipulate community practices effectively; principals should be conscious about major challenges that hinder community building practices in schools; PTSAâ€™s and parents should give quick responses for problems encountered so as to minimize educational wastage, etc.rnKey words: Community, Community building, PTSA, Government secondary school, School principal, Practice, Challenge.