2850 Harrison St, San Francisco, CA 94110

The two-unit residential building at 2850 Harrison Street in the Inner Mission, owned by Katharine H Blackwell, is a 1-story flats/duplex structure built in 1908. The building's permit history shows three significant permits: a reroofing project completed in 2009 at a cost of $5,675, and two expired permits from 1991 - one for the addition of a second unit to the basement including a bathroom, kitchen, and two bedrooms, and another for plaster repair.

A notable building complaint was filed in November 2004 regarding serious plumbing issues, including water leaks from the bathroom affecting the unit below and an unusable bathroom, though this complaint was marked as not active by December 2004. The property has experienced recurring issues with street cleaning and general maintenance in the immediate vicinity, according to multiple 311 calls between 2017 and 2024.

These include six reports of loose garbage or debris (most recently in August 2024), three general cleaning cases, two hazardous material incidents (glass found in May 2024), a defaced street cleaning sign (November 2022), and one sewage vent issue resolved in October 2021. While many of these street cleaning cases were resolved promptly, they suggest ongoing external maintenance challenges in the building's immediate surroundings.