139-141 Beaumont Ave, San Francisco, CA 94118

The two-unit residential building at 139-141 Beaumont Avenue in the Lone Mountain neighborhood is a two-story flats and duplex structure built in 1936, currently owned by Judy Hamaguchi. The property has undergone several significant improvements over the past decade, with the most recent work completed in early 2024 involving the replacement of 13 windows with aluminum materials on the building's front facade, representing the latest in a series of window upgrades that began in 2011-2012 when vinyl windows were installed in multiple phases.

The building has seen substantial infrastructure work including a sewer and house trap replacement in 2015, installation of a new steam boiler in 2013, and extension of the gas houseline in 2012. Historical records show earlier maintenance activities such as a reroofing project from 1994, though this permit has since expired. The property has experienced recurring issues with graffiti in recent years, with multiple incidents reported between 2020 and 2024, all of which were resolved by the City services.

There are also several recent parking enforcement matters related to driveway blockages, with at least one resulting in a citation. A fire complaint lodged in December 2015 regarding operation without a permit was investigated and found to have no merit. The building's maintenance record indicates regular upkeep and modernization efforts by the owners, particularly focusing on window improvements and essential systems infrastructure.