484 Guerrero St, San Francisco, CA 94110

484 Guerrero Street is a three-story, 6-unit multi-family residential building constructed in 1908, currently owned by the Song Gahn Chin Hom Trust. The property has undergone significant recent improvements focused on safety and modernization, including the ongoing installation of fire sprinklers throughout the ground floor (with an estimated cost of $24,000) and an upgraded fire alarm system to meet current code requirements, both initiated in 2024. The building completed its mandatory soft-story seismic retrofit in 2019, demonstrating compliance with earthquake safety requirements.

The property has a notable history of fire-related incidents, most significantly in 2002 when the rear section suffered fire damage that rendered the building uninhabitable until repairs were completed in 2004, costing approximately $40,000. Recent modifications include converting a garage into an ADU and renovating a ground floor guest room into a one-bedroom unit, though these renovations were initially reported in 2022 to have occurred without proper permits, leading to a building complaint. The building has experienced several maintenance and safety-related issues in its history, including 2002 violations related to lead paint hazards, fire escape maintenance, security concerns, and window repairs, though all these violations were subsequently abated by August 2002.

Recent building complaints have primarily focused on access and security issues, including a 2023 complaint regarding postal delivery access. While there have been multiple 311 calls related to the building's vicinity in recent years (primarily concerning street cleaning), these do not directly reflect on the building's condition. The property has undergone substantial safety upgrades in recent years, including the installation of low-frequency sounders in sleeping areas and updates to all existing fire alarm devices, though there have been some fire safety violations noted in 2023 regarding the sprinkler system maintenance that was subsequently corrected. The building's ongoing improvements, particularly in fire safety systems, suggest a commitment to addressing past deficiencies, though the property has experienced periodic issues with compliance and proper permitting in the past.