644-646 Greenwich St, San Francisco, CA 94133

The two-unit residential building at 644-646 Greenwich Street in San Francisco's North Beach neighborhood is a two-story flats and duplex structure built in 1924, currently owned by Chadwick & Beryl Ertola Family. The property has undergone several significant improvements over the past two decades, including a comprehensive kitchen remodel in 2015 (valued at $15,000) and the replacement of 21 windows in 2014 (valued at $14,000), both completed with proper permits. Other notable upgrades include reroofing work in 2005 ($13,226) and the installation of vinyl siding in 1997.

A concerning issue emerged in 2020 with documentation of a recurring water leak problem that appears to have been reported multiple times through 311 and Building Inspection channels, though the case is currently listed as not active. The building has experienced several sewer-related incidents in 2020, including flooding, water main issues, and sewage back-up problems, all of which were addressed through the PUC Sewer Operations response and work orders. The most recent activity related to the property includes parking enforcement calls in 2023 and 2020, though these are unrelated to the building's condition or amenities.

The comprehensive record of permits and improvements shows regular maintenance and upgrading of the property, with particular attention paid to modernizing the kitchen and improving energy efficiency through window replacement. However, the multiple sewer-related incidents in 2020, including flooding and back-up issues, represent the most significant challenges to the building's infrastructure noted in the available data. The absence of recent complaints or permit activity since these improvements and repairs suggests a period of relative stability for the building's systems and structure.