The project aims at evaluating and developing analytical-based approaches to resolve the unique issue for the post-war estate, Churchill Gardens. The study started with addressing existing conditions and problems; from outdoor micro climate to indoor thermal and day-lighting. Predominant in older buildings is heat loss in winter due to lack of insulation, thermal bridge and poor window quality and infiltration. Another would be wind tunnels created by the tall buildings alongside shallow plans and narrow floor plates. The team proposed seasonal strategies to improve building performance to achieve thermal comfort in free running condition, while reducing the operational energy. Adaptive solutions for hotter summers forecasting climate change in the future. Embodied carbon emission study provided supports for the decision of preserving the existing structure. The team looked at potentials of renewable energy and technologies aiming to achieve zero carbon emission.