3572-3576 20th St, San Francisco, CA 94110

The three-story, five-unit apartment building at 3572-3576 20th Street in San Francisco's Inner Mission district, owned by Mah Henry & Nancy Trust The, was constructed in 1911 and has undergone several significant changes over its lifetime. Building improvements include a complete reroofing project in 2006 ($8,500), the addition of bathrooms on the second and third floors in 1990, and the installation of fire sprinklers in the basement that same year.

The building experienced a series of violations in 2009 related to various maintenance issues, including problems with smoke detectors, interior surfaces, plumbing, and security features, though these were all abated by January 2020. More recent concerns were raised in 2018-2019 regarding a vacant commercial storefront, which resulted in notices of violation that were ultimately resolved. The most recent event of note was a complaint filed in March 2020 regarding potentially unpermitted and hazardous construction work, including excavation of the sidewalk concrete floor and possible plumbing and structural work, though this complaint is currently listed as not active.

The building has also had multiple street cleaning and graffiti-related issues in the vicinity, with several 311 calls in late 2024 regarding debris, including reports of abandoned mattresses and general garbage. Recent street space permits were issued in 2015, and planning records show an approved project for a small self-service restaurant (ice cream shop) at the location, as well as the installation of wireless equipment for T-Mobile on an existing utility pole. The building's maintenance history shows regular attention to infrastructure needs, though the 2009 violations suggest there was a period requiring increased oversight of basic building systems and safety features.