This review examines how mushroom mycelium can be used as a sustainable building material to reduce the construction industry’s carbon footprint. Six notable architectural projects from 2014-2021 demonstrate different approaches to using mycelium-based blocks and panels for constructing pavilions and temporary structures. The research shows that while mycelium composites offer environmental benefits and exciting design possibilities, they typically need reinforcement with traditional materials and careful production control to be effective in larger structures.