630-634 Oak St, San Francisco, CA 94117

The three-unit multi-family residential building at 630-634 Oak Street in Hayes Valley, owned by Peter Van Der Sterre since 2018, is a three-story flats and duplex structure built in 1908. The property has undergone several significant improvements in recent years, including the installation of a Mitsubishi heat pump cooling system for three rooms in 2023 and a 5.76 kW solar PV system with 16 modules in 2022. Plumbing improvements include a water heater installation for radiant heat in 2014, though this permit expired, and work on drain lines and a new floor sink in 2014.

The building's maintenance history shows attention to structural issues, with work on stairs and decks in 2008 to address dry rot, and an attempted rear garage structural repair in 2013 that was ultimately cancelled. The building has a history of routine safety inspections, with notable issues identified in 2003 and 2008 regarding stairs, fire safety equipment, and various building maintenance items; however, all violations were officially abated by October 2008. Since then, the property has generally maintained compliance with safety requirements, though there was an expired plumbing permit in 2014 for a water heater installation.

Recent activity at the property has primarily involved parking enforcement matters, with multiple parking violations recorded between 2024-2025, suggesting ongoing challenges with driveway access. A damaged side sewer vent cover was reported in September 2024 and remains in open status. The building's documented improvements, particularly the recent HVAC and solar installations, indicate ongoing maintenance and upgrading of the property, though there are some historical maintenance issues that prospective residents should be aware of.