339-341 West Portal Ave, San Francisco, CA 94127

The three-story mixed-use building at 339-341 West Portal Avenue, owned by Yang Chi-kuo & Lee Chen, was constructed in 1935 and contains three residential units plus commercial space. The property has experienced several significant events over its history, with the most pressing recent issues occurring between late 2024 and early 2025, including sidewalk defects, lighting problems, and water-related concerns. A noteworthy vacancy issue arose in 2019 when the property received violations for failing to comply with the vacant commercial storefront ordinance, though these violations were abated by September 2019.

The building's commercial space has housed various businesses, most recently Mysa Day Spa, which underwent multiple sign installations between 2020-2021, displaying both single- and double-faced wall signs with associated electrical work. The property has faced maintenance and safety challenges over the years, with complaints in 2012 regarding rotting decks, electrical issues, and a damaged living room floor. There have been two documented instances of blocked exits triggering fire safety complaints in 2007 and 2010, though both were promptly corrected.

Infrastructure improvements include a foundation subdrain and sump system installed in 2003 and sliding door replacement completed in 2004. Recent municipal service calls from late 2024 indicate ongoing maintenance needs, including issues with lighting, water leaks, and a collapsed sidewalk, though many of these cases were resolved or required no further action. The building's history also includes a brief period of illegal unit allegations in 1998, while more recent planning records show an approved proposal to build new two-unit condominiums on the site, though this appears to have been connected to a closed appeal.