463 21st Ave, San Francisco, CA 94121

The three-unit multi-family residential building at 463 21st Avenue in the Central Richmond neighborhood, owned by Raymond and Karen Leong Revocable Trust, has undergone significant window and door improvements over the past several years. The 1922 two-story structure has seen systematic updates to its windows, with the most recent work completed in early 2024 involving the replacement of four rear windows, continuing a pattern of window upgrades that began in 2014.

Between 2014 and 2024, the property has received careful attention to window maintenance, including replacing front and rear windows with wood-clad aluminum and fibrex materials, with all installations meeting modern energy efficiency standards (U-factor requirements specified). The building's maintenance history shows attention to structural and aesthetic improvements, including a 2014 door replacement and earlier repairs such as termite remediation in 1995. Historical records indicate a vertical and horizontal addition was completed in 1989, and while a reroofing permit from 1999 is listed as expired, no roofing issues have since been reported.

The property has experienced minimal external issues, with only four 311 calls documented since 2019, relating to sidewalk cleaning and parking violations, none of which indicate persistent problems or safety concerns. The most recent incident was resolved in September 2024 involving debris collection, and previous issues were similarly addressed promptly. The building's permit and maintenance record suggests regular upkeep and proactive improvements by the owners, with particular focus on energy efficiency and window maintenance over the past decade.