This study is based on the preparation of the sustainability assessment report with respect to the GRI Sustainability Reporting Standards 2016 for Timberwell Constructions. It covers economic, environmental and social sustainability aspects. The economic sustainability section covers climate change, risks, financial implications, and confirmed incidents of corruptions. The environmental sustainability section covers energy consumption, impacts on biodiversity, and environmental regulations. The social sustainability section covers new employee hires, employee turnover, actions taken against incidents of discrimination, and engagement with the local community.