639-643 Lyon St, San Francisco, CA 94117

The three-unit, three-story multi-family residential building at 639-643 Lyon Street in the Park North neighborhood, owned by Christopher E. Blakeley, has undergone several significant maintenance updates since 2022, including two roofing projects with costs of $9,000 (2023) and $45,000 (2022), indicating ongoing investment in building maintenance.

An important electrical upgrade was completed in 2004, installing 200-amp main service with four new meters, suggesting modernization of the building's infrastructure. The property experienced a series of building violations in late 2004, most notably concerning fire safety equipment and stairway safety issues, including problems with fire escape ladders, smoke detectors, and missing handrails/guardrails; however, all these violations were successfully abated by April 2005. The building's maintenance history shows regular attention to roofing needs, with two separate reroofing projects in recent years.

The surrounding area has experienced various local issues over the past several years, as documented in 311 calls, including driveway blocking incidents, sidewalk defects, and encampment reports, though these are primarily external to the building itself. Historical inspection records show a routine inspection in 2001 and the significant 2004 routine inspection that led to multiple violations, all of which were addressed and resolved. The building's recent history (2022-2023) suggests active management with particular focus on maintaining the building's exterior and safety systems.