3918-3920 23rd St, San Francisco, CA 94114

The two-unit residential building at 3918-3920 23rd Street in Noe Valley is a two-story flats and duplex structure built in 1900. The property has undergone numerous significant improvements over the past several decades, with the most recent major upgrade being the installation of a solar PV system completed in July 2022, consisting of 27 modules with a total capacity of 10.665 kW DC.

The building has had various maintenance and improvement projects, including insulation upgrades and smoke detector installation in 2010, window replacements in 2009, and multiple renovations in 1998-1999 that included kitchen and bathroom remodeling, roof replacement, skylight installation, and deck construction. In terms of safety and compliance issues, there were notable concerns regarding the front stairs, with violations recorded in 2000 and 2007 related to unpermitted work and safety code noncompliance, though these issues appear to have been resolved by March 2007.

The property has experienced some external infrastructure challenges as evidenced by multiple 311 calls regarding sidewalk defects in 2020-2022 and a tree maintenance issue in 2021, with the sidewalk issues being documented as both accepted and resolved cases. The building was also subject to investigation for illegal short-term rental activity in the lower unit, though this complaint is noted as abated in planning records.