444-450 Union St, San Francisco, CA 94133

The property at 444-450 Union Street is a two-story, multi-family residential building with 5 units, constructed in 1907, currently owned by Varennes Street Property LLC. The building is undergoing significant modifications, including the proposed addition of an ADU unit on the first and ground floors, with recent permit revisions (202408289649) indicating changes to bedroom, bathroom, and stairs configurations, as well as exterior sheathing and stucco work on the basement and first floor walls (202406114167).

This follows the original permit from April 2022 (202204111924) valued at $180,000 for the ADU addition. Recent plumbing and electrical work is also ongoing, with permits issued in December 2024 for kitchen remodeling and bathroom additions, suggesting proactive maintenance and improvements to the building's systems. The building has a history of addressing maintenance issues, with significant renovations completed in 2013 that included comprehensive updates to six bathrooms, four kitchens, and various electrical and plumbing systems across units 446, 448, 450, and 103 Varennes Street.

In 2005, the property underwent a routine inspection that identified several safety concerns, including issues with garbage receptacles, smoke detectors, wood stairs, fire extinguishers, water heater bracing, and emergency exits - all of which were documented as abated by June 15, 2005. While there have been recurring reports of paint deterioration between 2010-2012, recent improvements suggest these issues may have been addressed. The property has also experienced ongoing maintenance activity in response to external conditions, as evidenced by multiple 311 calls in 2023-2025 regarding street cleaning and debris removal, though these are primarily related to external areas rather than the building itself.