When TMG Partners and Rockwood Capital acquired the outdated 680 Folsom Street along with two adjacent buildings in the heart of downtown San Francisco in 2010, all these options were possible. In the end, they chose to redesign and reshape the outdated concrete-box 680 Folsom by replacing the core and building systems, adding horizontal and vertical space, and replacing the concrete facade with a new glass facade that completely revised the structure’s image. A new concrete core was added to optimize and seismically strengthen the structure, which now exceeds seismic code requirements.