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The need for sustainable practices in the construction sector is becoming more potent. There is an urgent need to explore strategies aimed at creating a thriving market forrecycled window materials. This research aims to provide valuable insights andrecommendations for advancing sustainable practices in the window market of theconstruction industry, ultimately contributing to environmental conservation andeconomic prosperity. The study uses the Life Cycle Analysis (LCA) methodology to assess the environmental impact of window renovation compared to the manufacture of new windows, focusing on two configurations: double and triple glazing renovations compared to new windows with corresponding configurations, where the focus is on the global warming potential of each case. The research methodology involved the Author's participation in a practical window renovation course, One-Click LCA training course, subsequent site visits for data collection, and modeling a case study building in BIM energy. The LCA was carried out with One Click LCA software using Environmental Product Declaration (EPD) data. The results highlight the significant environmental benefits associated with window renovation over the production of new windows. In particular, the triple glazing option proved to be the best alternative, as it offers the lowest U-value and meets Building Regulations (BBR) standards. A sensitivity analysis was conducted to quantify the effects of changing key study elements such as the windows U-values and the electricity profile, However the outcome remained consistent with the study findings. The results of the study illustrate the potential of window renovation as a sustainable alternative in the construction sector. As well as contribute to promoting sustainable practices in the construction industry and provides valuable guidance for policymakers, practitioners, and stakeholders alike., This work is done in collaboration with Auktoriserat Fönsterunderhåll AB and its industry partners.