The construction sector is important to the country's growth, social, and economic activities, and it serves as a foundation for other industries that have impact on all aspects of life. But the industry has been challenged with the current COVID-19 pandemic and causes risk for its survival. The main aim of this research was to present the contributions and impacts of the COVID-19 pandemic on public building construction projects in Bahir Dar city. COVID-19 has a tremendous impact on building projects, although legal consequences differ from state to state and contract to contract. COVID-19 is not, in general, making projects hard to accomplish at this time. However, because supply chains have been significantly disturbed, it slows them down, causing delays and disruption. In construction, the impact will be seen on temporary workers or daily laborers since construction work, in particular small and medium projects, will suffer significant losses on demand; Therefore, the daily income will drop to a minimum during the lockdown. From the finding of this research material supply chain-related, cost-related, other impacts, time-related, and claim-related impacts are the major effects of COVID-19 on the public building construction industry in Bahir Dar city. The study is developed through a literature survey and in addition to this, questionnaire-based studies,case studies and Interviews also be conducted with various parties which have direct involvement in construction activities to strengthen the ideas of the subject matter. After the field survey, the questionnaire data were analyzed using RII (relative importance index) and the effects ranked based on their severity index and correlation coefficient also computed to measure the strength of correlation between the respondent’s perspective of the three construction parties and Cronbach’s alpha was computed to check the reliability of the data used using SPSS software and based on the finding, time overrun, delay in delivery (material, machinery), increasing of idle hours & machinery, are the most frequent time related impacts of the pandemic, escalation of material price, cash flow shortage, cost overrun are the major cost-related impact, global supply chain disruption, foreign currency/LC disruption, shortage of material to support ongoing projects are supply chain related impacts of pandemic and there is no budget change due to pandemic.