491 23rd Ave, San Francisco, CA 94121

The two-unit residential building at 491 23rd Avenue, located in the Central Richmond neighborhood, was constructed in 1915 as a single-family dwelling and has undergone several significant modifications over the years. The property has been undergoing substantial changes recentlty, with the most notable being an approved horizontal addition and comprehensive remodeling project in 2021 (cost: $650,000) that included new bathrooms, kitchens, stairs, and a deck across both stories. This project also laid the groundwork for adding an ADU unit on the first level, with permits filed in 2022.

More recent improvements include the installation of a solar panel system in December 2022, combining with previously installed panels to achieve a total rating of 4.47 kW. The building's history reveals prior compliance issues and unauthorized modifications that were addressed through various permits and inspections. A significant violations case from 2001 documented concerns about illegal units and unpermitted modifications, including a garage bathroom and unauthorized use of crawl space as a bedroom.

However, these issues were marked as abated by October 2004. The property has undergone several infrastructure improvements, including multiple roof replacements (1998, 2007), garage modifications (1997), and various interior renovations in the early 2000s, including kitchen and bathroom remodels on multiple floors. Recent years have seen numerous parking-related complaints in the vicinity, with multiple reports of illegal parking and sidewalk obstruction between 2022 and 2024, though these are external to the building itself. The most recent 311 calls from 2024 have primarily concerned street maintenance issues such as graffiti and damaged trees.