But not really. The shiny brass plaque by the entrance reads, "This house, built in 1881, was once occupied by Sir Arthur Conan Doyle." San Francisco Plaques seems to have the definitive explanation. It cites Doyle's memoir, which describes the author's trip to this address in 1923 while he was staying at the Clift Hotel downtown. He visited the office of a doctor who shared his interest in spiritualism. Thus he "occupied" perhaps a room or two of the house for a few hours.
They also note that "a publicist who once owned the house is responsible for placing the plaque." This is a classic publicity stunt: implying more than it claims and staying just this side of an outright lie. I don't know why this owner wanted to publicize his house, unless it was to boost its value on the real estate market.
Clearly the publicist knew that people are fascinated by places where authors lived. I confess that during all the years I lived in Philadelphia, I never made it to the house where Edgar Allen Poe lived for a while, even though the National Park Service does its usual superb job of making it available. However on a trip to London, I did go to Maresfield Gardens to visit the house to which Sigmund Freud and his daughter Anna fled from the Nazis during World War II. It was fascinating to see all his personal items scattered around his study and, of course, the original psychiatrist's couch.