173-175 Parnassus Ave, San Francisco, CA 94117

The property at 173-175 Parnassus Avenue is a two-story, five-unit multi-family residential building constructed in 1910, currently owned by Steven H & Carmen L Woo Rev. The building has undergone several significant infrastructure improvements in recent years, most notably completing its mandatory soft-story seismic retrofit in 2016 at a cost of $58,000, demonstrating compliance with safety requirements.

Other major upgrades include a 200-amp electrical service upgrade in 2005, a roof replacement in 2006, and the addition of both first and second-floor decks (completed in 1997), though the deck construction initially occurred without permits. The building's maintenance history shows regular upkeep, with two routine housing inspections in 1998 and 2009 showing no outstanding issues. Recent activity at the property has primarily involved external maintenance matters such as street cleaning (January 2025), parking enforcement (multiple cases throughout 2023-2024), and addressing sidewalk issues.

There have been several reports of blocked driveways and graffiti in the surrounding area, as well as pavement defects noted and resolved in 2024. The building's soft-story program completion was classified as Tier 3, marking it as a significant seismic improvement. While the property has maintained good compliance with major building codes through its recent improvements, the neighborhood has experienced typical urban issues such as parking enforcement matters and street maintenance concerns, which have been documented through 311 calls.