3819-3821 23rd St, San Francisco, CA 94114

The property at 3819-3821 23rd Street in Noe Valley is a two-unit, two-story residential building constructed in 1905, currently owned by the Irene Mar Revocable Trust. The building has undergone significant improvements and safety upgrades in recent years, with substantial work completed between 2023 and 2024. Most notably, comprehensive fire safety systems have been installed or upgraded, including a new fire sprinkler system throughout the attic and travel areas (completed in January 2024) and a sprinkler monitoring system (completed in August 2024).

The property has also received major infrastructure upgrades, including a complete electrical rewiring of both units and a 200-amp service upgrade (completed in January 2024), new air conditioning systems (February 2024), and plumbing renovations including the installation of new fixtures throughout (November 2023). Recent improvements have focused on modernizing and maintaining the building's systems while addressing safety requirements. These include exterior modifications such as replacing stairs and balconies (January 2024) and installing permeable pavers.

The building has undergone interior updates including window replacements, roof work, and bathroom renovations. The property has experienced some maintenance issues as evidenced by multiple 311 calls regarding garbage and debris (typically furniture) incidents in 2023-2024, though these have generally been resolved promptly. A short-term rental complaint was filed in 2021 but appears to have been resolved with no further activity. The most recent planning records indicate approved modifications including window replacements, skylight installation, and various interior improvements, with several permits related to the property having been withdrawn or expired, likely due to changes in scope or reassessment of project requirements.