4145-4147 20th St, San Francisco, CA 94114

The three-unit, two-story multi-family residential building at 4145-4147 20th Street, constructed in 1908 and currently owned by the Christopher Lim Living Trust, is undergoing significant renovations as evidenced by multiple active permits in 2023. Recent major improvements include a $136,000 renovation in Unit 4147 adding new windows, doors, and bathroom/kitchen updates (September 2023), and a $200,000 project in Unit 4145 adding bedroom and bathroom space (August 2023). The building has seen substantial upgrades since 2015, including electrical service improvements to 100 amp service for all units, kitchen and bathroom remodels, and various infrastructure repairs.

The property has a documented history of maintenance issues and tenant complaints, though most have been addressed and resolved. Notable past violations include security-related issues with exterior doors and handrails in 2002, and various tenant complaints about heating systems and yard drainage. Two significant complaints in 2015 regarding unauthorized construction work and neighbor notification were filed but later closed. Recent maintenance concerns have primarily involved external issues such as tree maintenance (2021), water leaks (2021), and parking enforcement matters.

The building permit records show active attention to property maintenance and improvement, particularly in 2023, with multiple permits for electrical, plumbing, and general building enhancements. The property's recent history suggests active management and ongoing improvements, with particular attention to unit modernization and building systems upgrades. The clustered nature of recent permits indicates a concentrated effort to update and improve the property, though some historical issues regarding neighbor notifications and construction permits have been noted. The building's age and history are typical of San Francisco's early 20th-century multi-family structures, with periodic updates and maintenance requirements being addressed through permits and inspections.