540-542 Parker Ave, San Francisco, CA 94118

The property at 540-542 Parker Ave is a two-unit, two-story multi-family residential building located in San Francisco's Lone Mountain neighborhood, built in 1939 and currently owned by the Calvert 1988 Family Trust. The building has undergone several significant improvements over the years, with the most recent being a complete reroofing project completed in 2024 at a cost of $14,950.

In 2008, substantial interior renovations were undertaken including kitchen and bathroom remodeling, along with the addition of new half-bathrooms on both the second floor and garage floor, supported by corresponding plumbing and electrical permits. The building has a notable history of maintenance and compliance activities, including a comprehensive 3-R inspection report completed in 2003 that involved significant electrical work across all floors.

In December 2011, multiple building violations were recorded relating to various maintenance issues including door replacements, floor coverings, kitchen vent repairs, window frame repairs, and sink repairs; however, all these violations were promptly abated by January 2012. Recent years have shown some recurring issues with parking enforcement and sidewalk maintenance, though these are primarily external to the building itself. The property underwent a condo conversion process, with records indicating approvals for both "herzig & berlese" and "none" developers, though no specific conversions appear to have been implemented, as evidenced by the unit count remaining at 2.