643-645 Guerrero St, San Francisco, CA 94110

The two-unit residential building at 643-645 Guerrero Street in Mission Dolores, owned by Cathy Gim Ng Separate Property Trust, is a two-story flats and duplex structure built in 1923. The property has undergone several significant improvements in recent years, with the most substantial renovations occurring in 2019, including a comprehensive kitchen remodel with new LED lighting, bathroom updates in the upper unit, and extensive electrical work including installation of a new 200A panel, multiple new fixtures, and smoke detectors.

That same year, the building received new wood frame windows facing the street, and the heating system was upgraded with the replacement of two furnaces. The building's maintenance history shows attention to basic infrastructure, with records of roof replacements in 1997 and 2002, though these permits are now expired. Recent external issues have primarily involved landscaping and sidewalk concerns, with multiple tree-related incidents reported in 2023-2024, including sidewalk lifting by tree roots and a fallen tree event.

There have also been some urban maintenance matters typical for the area, such as graffiti on the mailbox (2024) and various cleaning requests. The property's maintenance record demonstrates regular upkeep of essential systems, though some plumbing and electrical permits from 2019 show as expired despite corresponding completed work. The building's permit history suggests ongoing investment in maintaining and upgrading the property, with particular attention paid to modernizing interior spaces and improving energy systems.