When I go to Dynamo or Saint Francis with out-of-town or out-of-neighborhood visitors I take them by this unassuming house. The only thing you’ll notice about it is that it’s out-of-character with the rest of the neighborhood–which is because it’s thought to be the oldest private residence in San Francisco. (The 1780s Mission Dolores holds the title of the city’s oldest structure.)
It belonged to the Treat brothers (see Treat Avenue) and was built between 1849 and 1850. The house originally stood about 100ft to the west of its current location, but was moved to make way for the Pioneer Race Course, a horse track owned and operated by the Treats that covered most of this part of the neighborhood.