Abner Phelps House - Credit: Wikimedia Commons
The Abner Phelps House is one of the oldest private residences in San Francisco, constructed in approximately 1850 by Abner Phelps and his wife Augusta Roussell with pre-constructed house parts. It is located at 1111 Oak Street just west of Divisadero Street in San Francisco's Haight Ashbury district. The house is not open to the public, and as of 2019 is the location of a private business. Read more on Wikipedia
Source: en.wikipedia.org