456-458 4th Ave, San Francisco, CA 94118

The duplex property at 456-458 4th Avenue in San Francisco's Inner Richmond district, owned by Vincent K M Ng & Shirley N, has undergone significant improvements since its construction in 1909. The most substantial recent renovations occurred between 2014-2015, including comprehensive unit upgrades such as insulation installation, drywall replacement with soundproofing, and major plumbing and electrical overhauls.

The building's electrical system received a substantial upgrade in January 2015, with a main meter upgrade to 200A, complete rewiring of the second floor, installation of new lighting fixtures, and the addition of smoke detectors, while plumbing improvements included bathroom and kitchen remodels with modern fixtures. Previous improvements include a notable horizontal and vertical extension with a rear addition completed in 1986. The property has experienced some maintenance and safety concerns in recent years, with the most significant issues being a flooding incident in March 2021 that required PUC Sewer Operations intervention, and a collapsed sidewalk reported in September 2021 that remains open.

The building's location has faced recurring issues with parked vehicles blocking the driveway, particularly evident in multiple reports between 2018-2021, though several of these cases were invalid due to incomplete reporting information. Other infrastructure-related concerns include a pavement defect reported in April 2015 and a customer callback in May 2015, both of which were resolved. The property has received substantial upgrades over the past decade, particularly in 2014-2015, making significant improvements to resident safety and comfort, though some external maintenance issues remain to be addressed.