434-436 20th Ave, San Francisco, CA 94121

Located in the Central Richmond neighborhood, 434-436 20th Avenue is a two-unit, three-story multi-family residential building originally constructed in 1916. The property has undergone significant modifications in recent years, most notably a major horizontal and vertical addition permitted in 2020 (valued at $940,500) to convert the structure into a three-story, three-unit building. This renovation included extensive fire safety improvements, with the installation of new fire sprinklers ($55,377) in 2023 and a dedicated fire alarm system with monitoring ($12,723) completed in October 2024.

The building systems have also been upgraded, with new mechanical and ventilation systems and furnaces being installed as part of the recent work, as documented in multiple permits throughout 2022-2024. The property's renovation history reveals some challenges, including a complaint filed in January 2024 regarding unsafe scaffolding and debris during exterior work, though this permit is now listed as active rather than resolved. Earlier work in 2022 generated a complaint about unpermitted subcontractor work, sidewalk blocking, and dust issues, though this complaint is no longer active.

Historical concerns include a 2006 electrical issue with a porch outlet that generated a burning odor, which was subsequently resolved. Recent activity around the building has generated multiple parking-related complaints, with several citations issued in late 2024 for driveway blocking. The property underwent a change in scope during the 2020 renovation planning, as a 2022 permit revision removed a proposed roof deck from the original plans to reduce costs. The building is currently undergoing final systems improvements, with active plumbing and electrical permits from late 2024 for furnace installation and mechanical upgrades, indicating that the major renovation project is nearing completion.