456-458 Greenwich St, San Francisco, CA 94133

The two-unit residential building at 456-458 Greenwich Street in Telegraph Hill, owned by Michael L. Ditzler, is a two-story flats/duplex structure built in 1906. The building's maintenance history shows several significant repairs and upgrades over the years, with the most recent major work being the replacement of a gas water heater in October 2021.

In 2012, four street-visible windows were replaced at a cost of $4,500. Earlier improvements include a kitchen remodel with electrical upgrade and plaster repairs in 1992, followed by a revision for posts and beams in the kitchen that same year. Two permits from 1997 related to the garage area - one for reroofing and another for installing a concrete retaining wall - are no longer active.

The property has experienced some infrastructure challenges, including a sewage backup issue in January 2013 that required intervention from PUC Sewer Operations. The building has had minimal safety incidents on record, with only one false fire alarm recorded with no civilian injuries. Recent parking-related issues have been the most frequent concerns, with multiple citations for driveway blocking in 2021 and 2023. Additionally, there have been a few neighborhood-related incidents recorded through 311 calls, including concerns about homelessness (2019), an abandoned vehicle incident (2018), and some damaged benches on the sidewalk (2016), though these were primarily exterior to the building itself and were either unable to be located or determined not to be relevant to the property address.