This thesis presents a pioneering approach to enhance the environmental performance of building façades. The study concentrates on a comprehensive assessment of elements including daylighting, visual comfort, and thermal satisfaction within an integrated framework. Through an extensive literature review, it explores advanced techniques and tools aimed at evaluating and enhancing façade efficiency. The research introduces an inventive framework for crafting high-performance building façades by integrating computational tools and multi-objective optimisation. The outcomes emphasise the potential of sophisticated optimisation methods to surpass performance expectations and promote the development of sustainable built environments. This framework equips architects and designers with a potent toolkit for creating façades that not only exhibit visual appeal but also prioritise environmental sustainability and occupant well-being. Through the adoption of computational tools and optimisation approaches, the future of architectural design can place equal emphasis on aesthetics and sustainability, ultimately resulting in more efficient and comfortable built spaces.