546-548 25th Ave, San Francisco, CA 94121

The two-unit residential building at 546-548 25th Avenue in San Francisco's Central Richmond neighborhood is a two-story flats and duplex structure built in 1923, currently owned by Igor and Tatiana Cherkas. The building has undergone several notable renovations over the past few decades, with the most significant work occurring in 2007 when both electrical systems were extensively updated (including the installation of 15 lights, 20 receptacles, and a sub-panel) and insulation improvements were made in bedrooms and hallways.

Additional maintenance work includes an issued permit for window replacement in 2007 (six windows), street space permits in 2004 and 2017, and historical records show a reroofing project in 1995 and the installation of new nonbearing partitions to create a social room in 1985. Regarding safety and incident records, there have been no reported fire incidents or civilian injuries associated with the building, though there were two minor 311 calls in 2020: one regarding parking enforcement for a blocking vehicle and another related to a sewer matter that required follow-up.

The building's permit history suggests regular maintenance and updates, with the most recent significant improvements dating back to 2007. While the building is now over 100 years old, the documented upgrades indicate appropriate attention to infrastructure and systems maintenance over time.