172-174 Beaver St, San Francisco, CA 94114

The two-family residential building at 172-174 Beaver Street in Corona Heights, owned by Patrick J Calahan and Grace M L, is a two-story flats and duplex structure built in 1885. The building has undergone several significant renovations and improvements over the past two decades, with the most recent major work focusing on mechanical systems including a furnace installation and upper sewer lateral replacement in 2021-2022.

Previous substantial updates were completed in 2014, including voluntary structural strengthening of the upper floor, kitchen remodeling, window replacements, and the addition of built-in shelves and a gas fireplace. The property has received regular maintenance attention, including foundation repairs in 2013 and multiple kitchen and bathroom renovations across both units between 2010-2014. Two historical building complaints from 2000-2001 were resolved promptly, relating to water drainage issues and a retaining wall height discrepancy, though these are now considered inactive.

Recent activity at the property has primarily involved parking-related concerns, with multiple 311 calls about abandoned vehicles and illegal parking between August 2024 and December 2024, most of which were resolved by parking enforcement. Recent property maintenance issues have included concerns about waste receptacle placement (resolved) and a sidewalk defect that was determined not to be egregious. The building's permit history demonstrates ongoing investment in maintaining and upgrading the property, with particular attention to structural, mechanical, and aesthetic improvements over time.