1227-1229 4th Ave, San Francisco, CA 94122

The two-unit residential building at 1227-1229 4th Avenue in San Francisco's Inner Sunset neighborhood is a two-story flats and duplex structure built in 1906, currently owned by Robert A. and Elaine J.

Borgen. The building's maintenance history shows two significant permitted improvements over the past two decades, with the first being a reroofing project completed in 2002 at a cost of $9,750, though this permit has since expired.

More recently, in January 2013, necessary infrastructure work was performed on the property regarding sewer line repair, which was completed successfully and represents a positive maintenance intervention for the building's plumbing systems. While both permitted improvements indicate attention to basic maintenance needs, the relative age of these interventions (over a decade ago for both) suggests there could be other building systems and structures that may warrant attention, particularly given the building's age of over 117 years.