Precast concrete is the premier building system for parking structures, and it helps mixed-use projects succeed. Mixed-use projects necessitate the integration of multiple-use spaces, which frequently have opposing design requirements, such as a parking facility (unconditioned space) with a residential facility (quiet areas) or retail. High-performance precast concrete envelope and structural systems are used for various mixed-use projects, providing the aesthetic and structural versatility required, from creating open floor plates for retail and office space to providing passive fire protection to designing parking structures that blend in with their surroundings.