447-453 Linden St, San Francisco, CA 94102

The three-story multi-family residential building at 447-453 Linden Street in Hayes Valley, owned by Jacob M Kiestoff, was constructed in 1900 and has undergone several significant renovations and safety upgrades in recent years. The property has seen substantial infrastructure improvements between 2014 and 2018, including the installation of a comprehensive fire safety system with sprinkler monitoring and new control panels, window replacements, a central heating system installation, and plumbing upgrades.

The building's safety features have been systematically enhanced, with recent work in 2017 focusing on fire sprinkler waterflow and supervisory systems, including new smoke detectors and pull stations. The property has experienced ongoing maintenance and improvement work, including a kitchen and bathroom remodel with additional bathroom installation in 2016, window replacements, and various plumbing system upgrades.

Recent 311 calls from 2020-2023 have primarily concerned external issues such as sidewalk cleaning and urban maintenance matters, with one notable incident in October 2022 involving an obstruction of a fire escape and crosswalk that remains under investigation. Fire records indicate two alarm system activations due to malfunction, with no injuries reported. While the building has undergone numerous improvements to enhance resident safety and comfort, the surrounding area has experienced periodic urban maintenance challenges as documented in the 311 call records.