536-542 Union St, San Francisco, CA 94133

The 5-unit residential building at 536-542 Union Street in Telegraph Hill, owned by Lucky & Shui Ying Lew Revoc, has experienced recurring sewer and plumbing issues over the past several years. Most notably, there have been two significant incidents regarding the building's sewer system: a verified leak into neighboring properties in 2019 that required repairs costing $50,000 (including updates to the kitchen, bathrooms, windows, heating system, and electrical infrastructure), and a more recent water intrusion issue in August 2024 that involved possible sewer water in the basement.

The building underwent several improvements in 2015-2016, including comprehensive kitchen and bathroom remodeling, electrical system upgrades, and plumbing work, while previously completed repairs in 1984 addressed stucco, window, and painting issues. The property has a documented history of violations and complaints that have been resolved, including multiple safety concerns in 2005 regarding emergency exits, smoke detectors, fire extinguishers, and wooden stairs, which were all addressed by December 2019.

The building was constructed in 1907, is classified as a "Flat & Store" building, and consists of three stories. Recent activity in the area includes recurring reports of garbage and debris on the street, with multiple instances of human waste or debris requiring city intervention between 2024 and 2025. While the building's infrastructure improvements indicate active maintenance efforts, the recurring sewer-related issues suggest an ongoing challenge with this critical system.