3549-3551 20th St, San Francisco, CA 94110

The property at 3549-3551 20th Street is a two-story, multi-family residential building constructed in 1900 in San Francisco's Inner Mission neighborhood. The building has undergone several significant renovations and improvements in recent years, most notably a bathroom remodel and kitchen updates in 2021 (totaling $30,000 in improvements), foundation replacement work in the garage area in 2012 ($75,000), and various electrical and plumbing upgrades including new gas lines, furnace installation, and bathroom fixtures.

The property has experienced some maintenance and safety issues over its history, with multiple fire violations recorded in 2007 related to building safety systems (smoke detectors, fire escapes, and extinguishers), and more recent concerns in 2017 regarding alarm systems, overcrowding, and operating without proper permits. There have been recurring issues with garbage and debris in the vicinity of the property, with numerous 311 calls in late 2024 and early 2025, including reports of rodent infestation in September 2024.

The building's owners have made substantial investments in improvements over the years, including the recent kitchen and bathroom updates, but the property has experienced some regulatory challenges and environmental concerns, particularly related to waste management and building safety systems. Additionally, there is a record of one tenant buyout for $6,990 in October 2016.