641-645 Hayes St, San Francisco, CA 94102

The three-story, seven-unit multi-family residential building at 641-645 Hayes St, owned by Hayes Valley Properties LLC, has a long history dating back to 1906. The property has undergone several significant repair and renovation attempts over the years, with permits issued for various improvements including kitchen and bathroom updates, window replacements, and structural repairs.

However, there have been alarming patterns of maintenance issues and unpermitted work, particularly during 2017-2019, including complaints about unauthorized structural modifications, water damage, plumbing work, and concerns about mold growth. Most concerning are the active building violations from 2016-2017 relating to interior surfaces, wall repairs, and lead paint concerns, along with recent tenant complaints from 2019 documenting multiple serious issues including leaking ceilings, lack of heat, exposed electrical wiring, and concerns about dilapidated emergency exit stairs. Multiple 311 calls in 2024 regarding noise disturbances and graffiti, as well as recent maintenance issues, suggest ongoing challenges with building upkeep and neighborhood management.

The building has experienced three fire-related incidents, though none resulted in civilian injuries, and has undergone various street space and sidewalk permit changes since 2001. Despite some completed repairs (such as addressing rotted headers and window replacements), the building's maintenance history shows recurring problems with both permitted and unpermitted work, and multiple instances of decay and deterioration that have required repeated intervention by city inspectors and housing authorities. The property currently bears multiple unresolved building violations and numerous documented tenant concerns, particularly regarding structural integrity, heating systems, and water-related damage.