851 De Haro St, San Francisco, CA 94107

The two-unit, two-story residential building at 851 De Haro Street in Potrero Hill, owned by Lynn Klein Revocable Living Trust, was constructed in 1905 and has undergone several significant maintenance and infrastructure improvements over the past decades. The most recent major work was completed in March 2024, involving a comprehensive re-roofing project costing $48,700, which included the installation of fiberglass shingles and new felt underlayment.

The property has seen consistent maintenance of critical systems, including sewer repairs in 2019 and a gas heater replacement in 2012, though the heater permit is listed as expired. Earlier improvements include deck construction, stair repairs, and various exterior maintenance works in the late 1990s and 2000s. Recent incidents indicate some ongoing infrastructure challenges in the vicinity, with two sewer-related issues reported in January 2025 (one flooding incident and one water leak), and an open sidewalk defect case from August 2024.

While a fire alarm system activation was recorded with no actual fire or injuries, the address has maintained a relatively low incident profile overall. The building's maintenance history suggests regular upkeep of structural and safety features, though some older permits from 1999 and 2000 are marked as expired, including previous stair repair work and cedar shingle application. The property has also experienced typical urban neighborhood issues, as evidenced by historical 311 calls regarding street lighting, abandoned vehicles, and color curb matters, though these are not directly related to the building's condition or maintenance.