1748-1750 Filbert St, San Francisco, CA 94123

The property at 1748-1750 Filbert Street is a three-story multi-family residential building constructed in 1908, currently owned by John & Lisa Vigo Revocable Living Trust. This address underwent significant improvements between 2018-2020, including the addition of an ADU (Accessory Dwelling Unit) to the rear building, completed with comprehensive fire sprinkler systems, new electrical, plumbing, and mechanical work.

The project, which added 812 square feet of living space plus mechanical areas, was valued at $150,000 and included safety enhancements such as a new residential fire sprinkler system costing $10,374. Other major improvements during this period included foundation repairs ($45,000) and various infrastructure upgrades to modernize the building's systems. The property's maintenance record shows attention to safety and compliance, with past plumbing work including waste & vent pipe replacements, electrical system upgrades, and solar preparation installations completed in 2009.

The building has maintained active compliance with building codes, though there is a historical housing complaint from 1997 regarding inadequate heating that remains listed as active without resolution noted in the records. Recent activity at the property has primarily involved parking enforcement issues, with multiple citations issued for driveway blocking between 2024-2025, though these are not directly related to the building's condition or habitability. The most recent permitted work focuses on ensuring the ADU addition meets current safety standards, with various permits showing completion of necessary infrastructure changes to support the additional unit while maintaining the existing structure's integrity.