813-817 Mason St, San Francisco, CA 94108

The four-unit, three-story multi-family residential building at 813-817 Mason Street, owned by Leong Peng & Wikkerink Paul, was constructed in 1907 and has undergone several significant improvements over the past decade. Most notably, in 2020, the building received a voluntary seismic retrofit costing $68,000, demonstrating commitment to structural safety. The property has seen substantial infrastructure upgrades, including a furnace replacement in 2019, 40-gallon water heater replacement in 2018, and comprehensive electrical work in 2011-2013 involving new wiring, subpanels, and circuit installations.

The building's maintenance history shows proactive care, with kitchen and bathroom upgrades completed in 2012, along with window replacements and the removal of a non-compliant room from the top floor. The building experienced several violations in 2016 related to safety equipment requirements, including carbon monoxide alarms, smoke alarms, and fire extinguisher maintenance, though these were all abated by July 2016. Earlier issues from 2010-2016 included various safety concerns such as egress obstruction and utility-related requirements, all of which were resolved.

More recent 311 calls from 2022-2024 have primarily involved external maintenance issues such as graffiti, which was affected by COVID-related enforcement suspensions, and sidewalk cleaning needs. The most recent documented incident was an open hazardous materials case from October 2023. The property's permit history shows regular maintenance and upgrading of systems, with no recent building code violations or serious safety concerns.