1137-1139 Kansas St, San Francisco, CA 94107

The two-family residential building at 1137-1139 Kansas Street in Potrero Hill is a 2-story flats/duplex structure built in 1907, currently owned by Spencer & Fallon Ke Mulcahy. The property has experienced several significant maintenance and infrastructure issues in recent years, with one of the most concerning being multiple reports of sewage leaks in 2024-2025, affecting the sidewalk and retaining wall areas.

There have also been ongoing issues with plumbing and sewer systems, including a November 2024 sewer odor incident and a December 2024 plumbing problem. The building's maintenance history shows interest in improvements, with records indicating window and door replacements in 2010, and a substantial rear deck renovation undertaken in 2008 costing $10,000.

There have been past concerns about unauthorized unit use and short-term rentals, with complaints filed in 2021 and 2008, though these were subsequently addressed. Recent external issues include multiple sidewalk parking violations, an unresolved sidewalk defect due to tree roots, and a temporary graffiti incident from August 2024. The property's planning records confirm the rear deck addition was properly permitted and approved, indicating some level of compliance with building regulations.