3137-3139 Steiner St, San Francisco, CA 94123

The two-unit residential building at 3137-3139 Steiner Street in Cow Hollow is a two-story flats and duplex structure built in 1907, currently owned by the Massucco Family Survivors Trust. The property has undergone several significant improvements over the past three decades, with its most notable recent upgrade being the installation of 17 energy-efficient vinyl windows in 2006, featuring double-pane construction with a U-factor of .30, completed at a cost of $5,985.

Earlier renovations in 2003 addressed multiple areas, including bathroom electrical work (E200302033493) to install lighting, exhaust fan, GFCI receptacle, and kitchen wiring for appliances, along with bathroom improvements including sheetrock work, closet wall modifications, dry rot repairs, and plumbing fixture updates costing $20,000. The building has also received important structural enhancements, including foundation work in 1991 with the installation of a concrete cap and secure bolting of mudsills to improve seismic safety.

The property has experienced relatively few maintenance issues over its history, though there is currently an open maintenance issue reported in October 2021 regarding a damaged tree with reported vandalism. The building's permit history suggests regular maintenance and modernization efforts by the ownership, with no recorded building code violations or safety concerns in the available data. The most recent substantial improvements were made in the mid-2000s, focusing on energy efficiency and general upkeep, while earlier structural work in the early 1990s addressed foundational stabilization.