489-495 Utah St, San Francisco, CA 94110

The three-story multi-family residential building at 489-495 Utah Street in Potrero Hill, owned by Crystal Seungmee Yang, was constructed in 1904 and contains 4 units. The property has undergone significant modifications and faced several regulatory challenges over the past two decades. Most notably, between 2015 and 2018, the rear building underwent a controversial transformation from a shed to an accessory dwelling unit (ADU), which included the installation of fire sprinklers, electrical work, and plumbing modifications.

This conversion spurred multiple code enforcement actions, including a 2016 violation for unpermitted construction that resulted in monthly monitoring fees. The property has also seen substantial upgrades to its core systems, including a 200-amp electrical service upgrade, furnace replacements for multiple units, and bathroom and kitchen remodels. Historical records show persistent maintenance and compliance issues, particularly regarding egress and safety requirements. In 2015, there was a violation regarding unauthorized stairway modifications, and previous complaints from 2003 and 2007 involved various building maintenance concerns.

Recent infrastructure updates have included multiple sewage backup incidents in 2020-2022, which were resolved by city services. The building's exterior has been modified to include translucent wall sections on the north property line, and several units have received new windows. The property has also experienced some neighborhood impact issues during construction periods, with complaints about debris management and construction activity. While many of these historical issues have been resolved through proper permitting and compliance measures, the pattern of construction-related violations and maintenance concerns suggests an ongoing need for careful monitoring of building modifications and maintenance practices.