2355-2357 21st Ave, San Francisco, CA 94116

The two-unit residential building at 2355-2357 21st Avenue, owned by Alan Hong Liang, is a two-story flats and duplex structure built in 1927 in the Parkside neighborhood. The property has undergone significant recent improvements, most notably a comprehensive kitchen and bathroom remodeling project in late 2018, which included new fixtures, cabinets, and appliances, with associated electrical and plumbing work costing over $50,000.

The building has also been modernized with the installation of solar panels in July 2020, consisting of two separate systems totaling 5.6 kW on the roof. Earlier improvements include window replacements in 2002 and reroofing in 1997. The property has experienced some maintenance and safety concerns, including a significant complaint in May 2018 regarding peeling paint inside and outside the residence, particularly in the backyard where lead testing had previously occurred, though this complaint is listed as not active.

There was a brief period in 2003 when a bathroom remodeling project was completed without permit, but this was promptly addressed. More recently, there has been a recorded sewage back-up issue from the side sewer vent in January 2025, which was reportedly resolved. The building's vicinity has experienced recurring issues with driveway blockages, as evidenced by multiple parking enforcement calls between 2022 and 2024, though many of these complaints were found invalid or resulted in citations.