873-875 De Haro St, San Francisco, CA 94107

The property at 873-875 De Haro Street in Potrero Hill is a two-story, two-unit multi-family residential building constructed in 1926, currently owned by Twocarols LLC. The building has undergone significant improvements over the past decade, with the most recent major upgrade being the installation of a solar PV system with 12 modules (5.1 kW DC) completed in September 2023.

In 2016, the sewer line and house trap were replaced, marking the most recent major infrastructure work. Between 2012-2013, the building underwent substantial safety and comfort enhancements, including the installation of an overhead residential sprinkler system with 37 sprinklers, a hydronic radiant heat system, two fireplaces, and a complete electrical rewiring including a 200-amp service upgrade. During this period, the building also received comprehensive safety improvements such as a new fire alarm control panel, manual pull stations, heat detectors, and a sprinkler monitoring system.

The building's maintenance and improvement history shows regular upkeep and modernization efforts, though there were two building complaints in February 2013 regarding unauthorized work related to a fence height violation, which were promptly addressed within two weeks. The property has had minimal issues reported through 311 calls, with only three incidents recorded since 2014, including a 2014 plumbing inspection request, a water leak report, and a 2022 parking violation, none of which indicate recurring problems with the building's systems or structure. The extensive list of completed permits and improvements suggests proactive maintenance and upgrading of essential systems, including safety features, heating, plumbing, and electrical infrastructure, with most major systems having been updated or replaced within the past decade.