1483-1487 20th Ave, San Francisco, CA 94122

The property at 1485 20th Avenue in San Francisco's Central Sunset neighborhood is a two-unit, two-story multi-family residential building constructed in 1923, currently owned by Kelly Riggio. The building has undergone substantial recent improvements, with the most significant being the installation of a comprehensive sprinkler system in late 2023, including 64 heads and associated monitoring systems costing over $60,000 combined. Between 2020 and 2021, the building underwent significant expansion and renovation work, including a horizontal addition to develop accessory dwelling units (ADUs), interior remodeling of existing units, and seismic strengthening of the first floor.

The property has seen substantial modernization efforts in 2023, including complete plumbing system upgrades, bathroom and kitchen renovations, and electrical service upgrade to 400 amps, with the installation of radiant heating flooring systems also completed in late 2023. Historical records show some concerns regarding building code compliance, particularly regarding parking and driveway modifications in the rear yard, which were noted as violations of Section 136 of the Planning Code due to lack of permits and variance applications. However, these records are marked as "informational" and "disapproved," with no clear resolution noted.

The building's maintenance history includes a roof replacement in 2010 and window replacements in 2023, demonstrating ongoing investment in property upkeep. Two 311 calls from 2016 and 2019 related to abandoned vehicles near the property were resolved without incident. The property's development history suggests it was originally constructed as a duplex, but recent modifications and records indicate it may have been expanded to accommodate three units, though this has been noted as a potential code violation in planning records.