The UK Government's Climate Change Act (CCA) aims to achieve a net zero greenhouse gas emission by 2050. Supermarkets, being among the most energy-intensive non-residential buildings, play a pivotal role in this endeavour. This research delves into the influence of climate change on supermarket buildings, exploring methodologies to mitigate its impact and assessing its effects on operational energy and carbon emissions. The United Nations has emphasized the built environment's significant contribution to global CO2 emissions, necessitating urgent action. Using a quantitative approach, this study employs the TAS – EDSL software to simulate energy consumption, carbon emission, and building regulations for various supermarket case studies. The research also evaluates the performance of these buildings across different UK climates and emission scenarios, incorporating EU Zebra2020 tool metrics. The primary challenge encountered was the scarcity of literature specifically targeting the UK supermarket industry in the context of climate change. The research underscores the importance of balancing energy consumption, carbon emissions, and future climate adaptations, especially given the industry's nZEB target by 2050. The findings of this study serve as a beacon for all non-residential buildings, bridging the knowledge gap between climate change, building futureproofing, and emission reduction strategies. The research underscores the importance of long-term planning, continuous monitoring of energy-intensive buildings, and the holistic approach of reducing emissions across a building's lifespan. This research aims to guide policymakers and building designers in future-proofing structures, emphasizing the need for energy-efficient measures and the integration of renewable technologies. The overarching goal is to foster the creation of sustainable, climate-resilient buildings for future generations.