455-457 Pennsylvania Ave, San Francisco, CA 94107

The property at 455-457 Pennsylvania Avenue is a two-unit, two-story multi-family residential building located in San Francisco's Potrero Hill neighborhood, originally constructed in 1930. The building underwent significant expansion and modernization between 2004 and 2008, with the most substantial work occurring in 2004 when a large-scale renovation project was initiated to add an additional story and a new unit, valued at $300,000. This major renovation was followed by numerous related improvements in 2007, including bathroom relocations, installation of spiral stairs, window modifications, and structural reinforcements, supported by comprehensive electrical rewiring and plumbing updates.

The electrical work included installing three panels, 70 lights, 30 switches, and extensive outlet placements, while plumbing improvements featured the installation of two central heaters with 90% efficiency. The building's garage facilities were upgraded in 2008, including work on the garage door and ventilation systems. A rear deck replacement project was completed in 1997 prior to the major renovation work.

Recent records from 2024 show several 311 calls related to the property's vicinity, primarily concerning street maintenance issues such as garbage, debris, and graffiti, though none directly related to the building's condition or habitability. The most recent significant building-related event was a tenant buyout in July 2020, when a tenant received $80,000 to vacate the premises, which may indicate previous unit occupancy history. The property has maintained compliance with all major building codes and requirements since its substantial renovation work, with no recorded violations or safety concerns. Current building systems, including electrical and plumbing, were thoroughly updated during the 2004-2008 renovation period, providing modern infrastructure for its current occupants.