1731-1733 Mason St, San Francisco, CA 94133

The property at 1731-1733 Mason Street in Russian Hill is a two-unit, two-story multi-family residential building constructed in 1908, classified as a Flats & Duplex building. The current recorded owner is Bassett-maker 2005 Family T.

The building has undergone several significant improvements over the past few decades, with the most recent major work occurring in 2010, which included the removal of two closets and a non-bearing wall to create an open office space, along with the replacement of two furnaces and associated flue work. That same year, electrical upgrades were made with the installation of three new outlets and one new switch. Prior to these updates, the building underwent a complete reroofing in 2008 at a cost of $12,000.

Historical permit records from the late 1990s show attempts to address structural elements, including stair and deck modifications, though some of these permits expired without completion. The most recent incident related to the property was recorded in March 2022, involving an open service request to SFMTA regarding scooter-related mobility services, though this is not directly related to the building's condition or maintenance. In summary, the building's recent history shows regular maintenance and updating of essential systems, particularly in 2010 when multiple improvements were made to both the interior and infrastructure.