3867 20th St, San Francisco, CA 94114

The property at 3867 20th Street is a two-unit, two-story multi-family residential building constructed in 1924, currently owned by Max Jacob Weintraub. The building underwent significant improvements between 2021-2023, including the legal addition of a third unit in the garden area, comprehensive renovation of the upper floor including window upgrades and kitchen remodeling, and installation of a new NFPA 13 fire sprinkler system with monitoring capabilities.

The sprinkler system installation in 2022 cost over $25,000 and included 17 heads, while the associated 2023 permit for fire alarm monitoring was valued at $9,500. The upper unit received major electrical system upgrades in 2021, including complete rewiring with new fixtures and safety systems. Recent building maintenance and improvements include a complete plumbing overhaul in 2023 covering two bathrooms, laundry, and kitchen facilities, as well as a sewer and house trap replacement in late 2024.

The property has experienced several recent maintenance issues in the surrounding area, including a dead tree (reported October 2024), graffiti (November 2024), and multiple incidents of driveway blockage requiring police intervention. Historical records show earlier building maintenance activities including a roof replacement in 1991 and step board replacement in 1985. The most recent planning records confirm various approved improvements, including window replacements and interior remodels, with particular attention to maintaining the building's original architectural character.