901-903 De Haro St, San Francisco, CA 94107

The 901-903 De Haro Street property is a three-story, two-unit multi-family residential building located in Potrero Hill. Built in 1924 and currently owned by the Stenzler Family Living Trust 2007, this flats and duplex building has undergone significant renovations and faced several regulatory challenges over the past years. The building underwent substantial improvements between 2011-2012, including a voluntary foundation repair ($15,000), seismic retrofit of retaining walls ($16,100), and a major remodeling project ($135,000) that included infilling the rear porch, installing solar PV panels, and creating a new roof deck.

During this period, there were two complaints filed regarding unauthorized construction of a parapet stair penthouse and work beyond approved scope, though these were subsequently addressed. The renovation included comprehensive electrical work, with multiple permits showing installation of numerous fixtures, appliances, and safety systems, though some earlier permits from 2008-2010 expired. More recently, the building has experienced ongoing fire alarm system issues, with violations noted in 2024, 2023, 2022, and 2016, though most were promptly corrected.

The most recent fire code violation from September 2024 regarding fire extinguisher service requirements was marked as abated. The property has maintained its structural integrity, undergoing various plumbing upgrades including kitchen and bathroom remodels in both units, installation of radiant heating systems, and other modern improvements. The building's maintenance record shows regular upkeep of essential services, though the frequency of fire alarm system notifications suggests attention may be required for this particular aspect of building systems.