48-50 Santa Rosa Ave, San Francisco, CA 94112

The two-story multi-family residential building at 48-50 Santa Rosa Ave in Mission Terrace, owned by Martha S Ayerdis and Jose L Ayerdis, has a complex history dating back to its 1900 construction. The most notable historical event occurred between May 2000 and March 2002, when unauthorized construction of a horizontal addition to the rear of the building led to building violations that were eventually resolved through proper permitting.

This unauthorized construction was documented as a first-floor family room with a second-floor bedroom and bathroom, with the permit being issued in September 2000 for $32,000. More recently, between 2023 and 2025, there have been several maintenance and safety concerns, including a tree root issue causing sidewalk damage (reported December 2024 and currently open), a blocked exit resolved in March 2011, and multiple parking violations involving blocked driveways and illegal parking, particularly during 2024.

The property has also experienced recurring issues with street cleanliness, as evidenced by multiple 311 calls regarding garbage and debris on the street and sidewalks throughout 2024, with some cases being resolved with no work needed. The most recent building maintenance work on record was a trim board replacement project completed in 2016, costing $600, which involved work not visible from the street.