The Leland Renovation Project added significant architectural value to the built environment in downtown Houston. Previously the building was a Class C office building with a leaky, poorly insulated, dated exterior, a narrow crowded lobby and very inefficient mechanical systems. The architectural challenge included completely reskinning the building with a new, insulated and laminated (blast-resistant) glass curtainwall system. The challenge was complicated by the requirement to complete the renovation project without moving building occupants out of the building. The project requirements included achieving a 30% reduction from ASHRAE 90.1 2007 baseline. This was accomplished using a high performance curtainwall system.