337-339 Masonic Ave, San Francisco, CA 94118

The two-unit multi-family residential building at 337-339 Masonic Avenue in the Lone Mountain neighborhood, owned by Harry Somon Jew & Robbin To, is a 2-story flats and duplex structure constructed in 1941. The building's documented history shows minimal major structural changes, with the only significant maintenance record being a garage door replacement in 2004, though this permit has since expired.

The property has experienced a series of municipal service calls and minor incidents over the past year (2023-2024), with the most concerning being three separate fire alarm incidents: a gas leak investigation, a carbon monoxide detector activation (though no CO was found), and a smoke detector activation due to malfunction, none of which resulted in civilian injuries. Recent building maintenance and safety concerns include two instances of defaced parking signs in May 2024 (one still pending resolution), and multiple incidents of graffiti and illegal postings in mid-2024.

Streetlight maintenance and illegal postings have been logged as open cases in November 2024. The frequency of graffiti, illegal postings, and street cleaning issues suggest some ongoing maintenance challenges in the immediate vicinity. While the building has experienced three fire safety-related incidents, none resulted in injuries, indicating prompt emergency response, though the triggers for these alarms may warrant attention.