666-670 Ellis St, San Francisco, CA 94109

The 14-story, 100-unit apartment building at 666-670 Ellis Street in the Tenderloin, owned by 666 Ellis LP and constructed in 1970, has experienced numerous significant maintenance and safety issues in recent years. Most notably, there has been a recurring pattern of elevator failures, with multiple complaints in 2023 (including one as recent as January 2025) suggesting ongoing accessibility challenges for residents, particularly affecting those with disabilities.

The building has also faced plumbing challenges, with recent complaints about persistent bathtub drainage issues and low water pressure, following extensive plumbing work in 2015-2017 including boiler replacements and waste system upgrades. The building's safety systems have required continual updates and maintenance, including a significant fire system retrofit in 2017-2018 that added low-frequency horns, additional smoke detectors, and emergency responder radio coverage system. Recent fire complaints in 2024 and 2023 indicate ongoing concerns, with a sleeping area violation issued in November 2023.

The property has undergone various modernization efforts through the MOHCD RAD project, including elevator modernization, roofing, fire sprinkler system installation, and apartment upgrades. The building's management has faced criticism for communication regarding maintenance issues, particularly during periods of elevator outages when residents were reportedly left without timely updates. Multiple building violations have been recorded and subsequently abated, including issues related to boiler operation permits and various fire safety requirements, though recent complaints suggest some systems may still be experiencing challenges.