This is a duplex in the Buena Vista neighborhood near Upper Haight Street. It was designed by Henry Hill in 1950. Hill was a residential architect from Vienna and the original owners, Jewish Leftist refugees from Vienna during WWII, hired Hill to build this house. The owners were actually a husband and wife and a friend - hence the duplex design. One of the current owners was kind enough to supply me this information. He also told me that it was at the old Museum of Modern Art here in SF (in the Civic Center at McAllister St. and Van Ness Ave.) that there was an exhibit on local architects and Hill was featured in this exhibit. This was where the original owners learned about Hill, and since the owners were interested in Bauhaus and modern architecture, they hired him.