536-538 Parker Ave, San Francisco, CA 94118

The two-unit residential building at 536-538 Parker Avenue in Lone Mountain, owned by Anne-marie & Robert L Pierc, has undergone several significant improvements since its construction in 1939. The most substantial modernization was completed in 2015-2016, involving a comprehensive horizontal addition to the top floor, including an elevator installation, new bathroom, deck, and master suite, with associated structural work costing approximately $250,000. The building has received consistent maintenance and upgrades, including window replacements (most recently in 2019), roofing work (2010), and insulation improvements (2010).

The property has seen important systems upgrades, including a solar installation in 2017 (6.4kW), complete rewiring and electrical service upgrade to 200 amps in 2016, and plumbing renovations including shower pan installations in 2017. While the building has experienced two sewage backup incidents in October and November 2017, both were promptly addressed and resolved. The property's maintenance record shows regular upkeep and modernization, with recent work focused on maintaining building envelope performance through window upgrades and other improvements.

The building's permits and inspection history demonstrate compliance with building codes and regulations, with most recent permits focusing on window replacement and other exterior improvements. Planning records indicate proper variance applications and approvals for major modifications, showing adherence to local regulatory requirements. Recent 311 calls have primarily related to external issues not directly impacting building safety or habitability, such as parking enforcement and illegal postings.