2237 Union St, San Francisco, CA 94123

The four-story, two-unit multi-family residential building at 2237 Union Street in Cow Hollow, built in 1900 and currently owned by the Carney Family Revocable Trust, has undergone significant renovations and improvements over the past several years. Most notably, in 2022, a turret was added to the existing roof, and in 2018-2019, the property underwent substantial upgrades including the installation of an elevator, fire sprinkler monitoring system, and electrical improvements including a 400-amp service upgrade and solar panel installation. The building's modernization efforts included comprehensive plumbing work, such as the installation of a condensing boiler, radiant heating system, and extensive bathroom and kitchen renovations across multiple floors, with some work specifically noted for both 2235 and 2237 Union addresses.

The property has experienced several significant construction-related activities and some controversies over the years, with multiple excavation and construction permits issued between 2017-2019. There were three building complaints filed in 2019 regarding possible conversion/renovation concerns and construction noise, as well as a 2014 violation related to work exceeding the scope of permitted construction. Planning records indicate various renovation proposals, including a flood improvement project involving floor sealing and backflow valve installation, and a past violation related to unauthorized short-term rentals that has since been resolved.

The building's infrastructure has seen substantial upgrades, including comprehensive fire safety improvements, plumbing system replacements, and the addition of modern amenities, though some permits and works have had to be renewed or re-permitted to obtain final inspections. Recent activity at the property includes a sidewalk defect reported in September 2024, though this appears to be a public infrastructure issue related to tree roots rather than a building-specific concern. The building's extensive renovation history demonstrates significant investment in modernization and safety improvements, though there have been periods of construction-related disruption and some procedural issues requiring additional permitting or inspections to achieve final approvals. The property has been brought into compliance with various modern building codes and standards, including energy efficiency upgrades and fire safety improvements, though some infrastructure maintenance concerns have been noted in recent 311 calls related to street conditions.