510-512 Frederick St, San Francisco, CA 94122

The 4-story, 42-unit multi-family residential building at 510-512 Frederick Street, constructed in 1907, has undergone significant telecommunications infrastructure work in recent years, with multiple installations and removals of antennas and equipment by various carriers including T-Mobile, Sprint, and Dish Wireless between 2020 and 2023, worth approximately $210,000 combined. The building has also completed mandatory soft-story seismic retrofitting, with work now classified as "Complete, CFC Issued" under Tier 4 status, though there was a period of non-compliance noted in late 2018.

Recent fire safety inspections have revealed ongoing concerns, with the most recent violation issued in October 2023 regarding sleeping area requirements, while previous years have shown recurring issues with alarm systems, sprinklers, and fire extinguishers between 2019 and 2020, most of which were subsequently resolved. The building experienced structural corrections in 2023 requiring a $38,000 permit revision, and has had periodic maintenance and infrastructure upgrades including a new gas line (2017), hot water boiler replacement (2011), and various electrical system improvements.

Historical issues from 2011 included stair repairs and handrail requirements, which were addressed. The property has also generated multiple 311 calls in late 2024 regarding graffiti, encampments, and public space concerns, though these are external to the building proper.