The integration of low-carbon solutions in construction projects is a powerful strategy for reducing the built environment’s climate impact. An overview on key measures for cutting carbon emissions along the building life cycle is provided in Table 2. The cases explored in this report demonstrate the effectiveness of early commitment to sustainability goals and the adoption of innovative, low-carbon materials and techniques. From the use of alternative concrete binders and high-recycled content steel to the extensive use of timber, particularly in innovative applications like CLT slab and walls elements, these projects show how material choices can significantly lower carbon footprints.
Collaborative approaches between stakeholders – designers, contractors, consultants and suppliers – have proven essential in achieving ambitious climate targets. Early involvement of all parties in defining and pursuing low-carbon goals ensures that climate-neutral certification schemes, such as NollCO2 and Miljöbyggnad, can be successfully met. Moreover, employing solutions such as prefabrication, renewable energy sourcing, and minimising resource waste during construction not only cuts emissions, but also improves project efficiency and cost-effectiveness.
Ultimately, these examples highlight that a focus on low-carbon solutions in both design and construction phases leads to significant environmental impact reductions while enhancing building performance and resilience. With continued innovation and collaboration, the construction industry can move towards more sustainable and climate-neutral buildings, setting a strong precedent for future projects.
Beyond showcasing carbon cutting strategies, this report also underlines the current challenges in comparing climate impact assessments of building projects across Nordic countries and Estonia. Variations in methodologies, data sources and system boundaries create complexities in drawing direct comparisons, even within a single country. Factors such as the choice of area definitions, the inclusion or exclusion of specific life cycle stages and building components and the use of different Global Warming Potential (GWP) indicators all contribute to these discrepancies. Additionally, differences in how decarbonisation scenarios and exported energy are accounted for further complicate cross-country comparisons.
To enhance the transparency and usefulness of climate impact assessments, this report stresses the importance of clearly defining methodological choices and providing detailed explanations of the underlying assumptions. The method comparison table (Table 1) can aid interpretation and offers a transparent overview of the influential methodological aspects that affect the reported results. It is essential that future efforts focus on standardising key aspects of climate impact assessments, such as area definitions and GWP indicators, to improve comparability and provide more consistent, reliable data across the region.