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Purpose: The emphasis of this study is to examine how sustainability principles, particularly climate declarations, can be integrated into the Swedish construction industry to reduce environmental impact and resource use. The focus is on analyzing how climate declarations and construction cabins contribute to sustainable development within construction projects and how various stakeholders address these requirements. Method: A comprehensive literature review and case studies were conducted to gather relevant data.  Literature on sustainability and energy efficiency provided an overview and generated research questions to avoid redundancy with previous studies. Data was gathered from industry reports and scientific literature on sustainable building design, including case studies on climate declarations and construction cabins. Climate declaration data was collected from a national climate database by downloading declarations for different building types, which were analyzed for environmental impact. Additionally, interviews were conducted with industry experts to gain in-depth insights. Result: The results show that climate declarations support construction stakeholders in reducing environmental impact by prioritizing reuse, resource efficiency, and environmentally friendly material choices. The climate declaration aims to guide the industry toward more sustainable choices, though specific methods for achieving these goals are left to the industry. The findings indicate that construction companies face technical and financial challenges, with initial costs and uncertain returns hindering sustainability investments. Energy efficiency in construction cabins is variable, but new classification systems could improve performance, indicating that future efforts must focus on enhanced energy efficiency and renewable materials. Conclusion: The conclusion suggests that Swedish construction companies can reduce their environmental footprint through climate declarations and life cycle analyses, identifying sustainable solutions. The study highlights the significance of investing in energy-efficient technology and sustainable materials to support the industry's transition to climate neutrality. Future guidelines should promote circular material flows, fossil-free transport, and resource efficiency to aid a shift toward a more sustainable and climate-positive society.