Located at 130-50 Sutter, The Hallidie Building was designed in 1918 by Willis Polk, and is the first building in the country to feature glass curtain walls. It's also San Francisco Historical Landmark no. 37, which means all exterior and interior tinkering must first be approved by the city's Historic Preservation Commission. And approved they were! Flaws in the design have allowed rainwater to collect and corrode ornamental metal on the exterior of the building, reports SF Gate. The commission, noting the historic importance of the building, approved the refurbishment as long as the work doesn't alter the "visual condition and perception of the building."
· Movin' on Up: Hallidie building to upgrade [SF Gate]
· Snapped SF: Hallidie Building, Financial District [Curbed SF]
[Photo via Jim Malone]