Until the twentieth century, the western half of San Francisco remained sand dunes. Then it was covered with attached houses and apartment buildings. It is divided into two districts: the Richmond, north of Golden Gate Park; and the Sunset, south of the park.
Since these districts cover such a vast area, San Franciscans refer to the side closer to the center of the city as the Inner Richmond and the Inner Sunset, and to the side closer to the ocean as the Outer Richmond and the Outer Sunset.
Because both districts were built up at the same time, they look very similar. Most people, looking at a picture like this, couldn't tell you whether it is in the Richmond or the Sunset. This street happens to be in the Inner Sunset district.
Readers of the Nicole Tang Noonan mysteries know this is where Nicole grew up. If she were a real person, her family would live on a street like this, though I imagine they live in a house that has just one floor of living space above the street level rather than two, as these do.
Nicole talks about walking from home to visit the de Young Museum in Golden Gate Park. It is an easy walk from houses like these on the blocks along the south side of the park.