This research investigates the design and implementation of modular float glass systems that prioritize reusability and sustainability. It addresses a significant gap in built environment by challenging the conventional single-use paradigm of glass in construction. The project explores modular, demountable glass assemblies that can be disassembled and reused, aiming to extend the material’s lifecycle. Through a comprehensive review of current systems and the development of novel connection designs, the thesis proposes a pavilion-scale modular glass structure that exemplifies circularity in architecture. The focus is on interlocking, friction-fit connections that enable reversible assembly without adhesives or permanent fixings, maintaining both structural integrity and aesthetic quality. The methodology combines material testing, iterative prototyping, and numerical simulations using ANSYS and Karamba3D. Preliminary results show that these connections can improve durability, ease of disassembly, and environmental performance. The findings support the feasibility of reusable structural glass systems and contribute to a broader shift toward circular design in architecture.