472-474 Connecticut St, San Francisco, CA 94107

The two-unit residential building at 472-474 Connecticut Street in Potrero Hill is a two-story flats/duplex structure built in 1900 and currently owned by Gerald W. Guay. The property has undergone several significant improvements over the past three decades, most notably a substantial rear addition project in 2010-2011 that included kitchen expansion, new deck construction, and associated electrical and gas installations, with costs totaling over $25,000.

The building's maintenance history includes important infrastructure updates such as a sewer lateral replacement in 2022 and a cleanout/back-up prevention device installation in 2014, though the 2022 sewer-related incident suggests some lingering plumbing challenges. Earlier improvements included skylight installations in 2002, various interior modifications in the late 1990s (including kitchen cabinet and window replacements), and a re-roofing project in 1999. The property's recent activity records (2018-2023) show primarily municipal service calls, with some concerns about illegal parking in the vicinity and a few maintenance matters such as general cleaning and tree maintenance.

The building's permit and planning records indicate careful attention to structural and functional improvements, including rear yard variances and deck modifications to enhance living space. The most recent substantial work on record relates to the 2022 sewer infrastructure upgrade, while earlier improvements have focused on modernizing and expanding the living space. While the building has maintained active compliance with necessary permits and inspections, the relatively recent sewer issues suggest that plumbing infrastructure remains an area requiring periodic attention.