411 Pierce St, San Francisco, CA 94117

The three-story apartment building at 411 Pierce Street in Hayes Valley, owned by Plaza Group LLC, consists of 9 units and was constructed in 1900. The building has undergone several significant improvements over the past decade, with the most notable being the addition of an accessory dwelling unit (ADU) in 2017-2019, which included comprehensive fire safety upgrades such as a new fire sprinkler system and alarm installations costing over $100,000 combined.

Recent maintenance records show consistent attention to fire safety systems, though there have been recurring issues, including three fire extinguisher-related complaints between 2015-2024 and a 2021 violation for sprinkler/standpipe systems that was subsequently corrected. A concerning active complaint from December 2020 asserts that the building, classified as a multi-unit soft-story structure, has not been properly addressed under the city's soft-story property mandate, raising potential safety concerns. Recent infrastructure improvements include a 400-amp electrical service upgrade in 2018 and various unit renovations, including a 2015 kitchen and bathroom remodel in Unit 3.

The building's history shows regular maintenance of essential systems, though multiple fire safety violations and complaints suggest ongoing challenges with maintaining compliance across all safety systems. There have been various routine safety inspections throughout the years, with the most recent involving the building's soft-story classification. The property has experienced some external issues as documented in 311 calls, primarily related to general cleaning and parking concerns, though these are less relevant to the building's internal conditions.