539-541 21st Ave, San Francisco, CA 94121

The two-unit residential building at 539-541 21st Avenue in the Central Richmond neighborhood, owned by Perry and Nancy Ungson, has undergone several significant renovations and improvements since its construction in 1922. Most notably, recent upgrades include the installation of a solar panel system (3.78kW with 12 panels) and an energy storage system (13.5kWh Powerwall) in 2019-2020, demonstrating commitment to sustainable energy.

The property has seen substantial interior improvements over the past decade, including multiple kitchen remodels (most recently in 2018 at a cost of $22,347), bathroom renovations, and the conversion of the ground floor garage into a childcare space in 2016 (costing $60,000) which included comprehensive updates to electrical systems, plumbing, and fixtures. The building underwent termite repairs in early 2015, addressing issues identified in a report by Lingruen Associates.

Earlier renovation work included window replacement, reroofing, and various plumbing and electrical upgrades, including the installation of a new furnace and hot water heater in 2013. The property experienced some regulatory challenges in 2013-2014 related to unpermitted remodeling work, which resulted in violation notices and monitoring fees, though these issues were ultimately resolved and abated by July 2014. Since then, there have been no active building violations or complaints on record.