623-625 Cortland Ave, San Francisco, CA 94110

The property at 623-625 Cortland Ave is a mixed-use two-story building constructed in 1907, containing three residential units plus commercial space. The building's maintenance history shows regular upkeep, including window replacements in 1992, reroofing in 2002, and multiple water heater replacements in 2017. Significant infrastructure improvements include a solar panel installation in 2020 (4.03 kW), electrical system upgrades in 2005, and the resolution of unapproved conduit issues in 2012.

However, there are serious ongoing concerns related to unauthorized conversions of commercial space to residential use. Three active complaints filed between 2014 and 2023 regarding illegal unit conversions and changes of use remain unresolved, including a recent complaint from June 2023 about an allegedly vacant commercial structure. The building has experienced persistent sewer-related issues, with multiple sewage backup incidents reported through 311 calls between 2022 and 2024.

The most recent clusters of sewage discharge incidents occurred in late 2023 and 2024, with several cases involving 4-inch sewer vents and one noted flooding issue. While the property has received timely responses to these infrastructure problems, the recurring nature of the sewage issues suggests an ongoing drainage or plumbing challenge. Additionally, there was an illegal conversion of retail space to residential use reported in planning records, though this was officially closed with no violation found. The building's owners, Donaldo & Alice Navarrete R, have maintained the property through various improvements over the years, including solar panel installation and multiple utility upgrades, but the combination of unauthorized unit conversion complaints and persistent plumbing issues raises important questions about the building's current operational status.