Medical-Dental Building 490 Post Street is located in San Francisco's Union Square. It was built by the architect George Kelham in 1925. It is elevator served, with ADA access, and common area restrooms. The windows are wood-framed, sash windows that are operable and recently refurbished. There is a public parking garage in the building located off Mason Street. It is a 16-story building converted to 130 commercial condominiums in 2006. The building contains many dentists, physicians, as well as a few professional office businesses.