3131-3133 Mission St, San Francisco, CA 94110

The property at 3131-3133 Mission Street is a two-unit, two-story multi-family residential building constructed in 1906, currently owned by Antonio G. Arellano. The building underwent significant modifications in 2010 when the first-floor residential unit was converted into a dental office, involving substantial improvements including a $79,143 bathroom remodel for ADA compliance, installation of dental equipment, and associated plumbing and electrical work totaling over $200,000.

This conversion prompted multiple building code violations in 2011 related to unpermitted plumbing work, all of which were resolved by April 2011. The property has experienced several maintenance issues over the years, including heating system failures, security concerns, and various plumbing and appliance problems leading to multiple housing complaints in 2009, all of which were eventually addressed. Recent activity at the property has primarily consisted of regular municipal service calls, with several reports of street cleaning and debris issues in 2024, though these are related to public thoroughfares rather than the building itself.

The building's permit history shows attention to maintenance needs, including a roof replacement in 2005 and various infrastructure upgrades such as a tankless water heater installation in 2011 and HVAC improvements. The property has undergone proper zoning verification and residential conversion processes, confirming its compliance with local regulations. While there were some issues with unpermitted work in the past, these have been addressed, and the building's recent history shows no active violations or complaints directly related to the structure itself.