This paper addresses the development of sustainable and energy-efficient building materials through the synergy of incorporating plaster and polystyrene biocomposites in various ways. This research represents a major advanced focus on optimizing thermal and mechanical properties, not only to improve thermal efficiency and structural integrity, but also to address aspects of lighting and acoustic performance that are often overlooked in architectural design. This work examines the impact of biocomposite materials on the lighting quality of architectural spaces, in addition to evaluating their thermal insulation properties and mechanical resistance. This study also stresses on how material composition affects natural and artificial light, aiming to find a balance that maximizes energy efficiency while creating a comfortable, bright environment. Additionally, the project studies the acoustic properties of biocomposites to understand their thermal and acoustic absorption potential. The ecological perspective is an integral part of this study, emphasizing the use of recycled polystyrene to meet sustainability principles. The aim is to provide viable information on the development of environmentally friendly building materials, including thermal efficiency, structural integrity, optimal lighting, and acoustic comfort. This holistic approach not only addresses the immediate needs of the built environment but is also consistent with a broader commitment to environmentally responsible building practices. The results in this work lays as good basis of foundations for the development of integrated and sustainable architectural solutions, promoting resilience and harmonious relationships between the built environment and its occupants.