San Francisco project proposes dwelling unit merger and new ADU despite housing concerns

The San Francisco Planning Commission convened on July 4, 2025, to discuss a significant project proposal at 250 Alma Street, which seeks conditional use authorization for the removal of a residential flat and the addition of an accessory dwelling unit (ADU). The existing three-story building currently houses three residential flats, with the proposal involving the removal of the second-floor flat to create additional space for the families residing in the building.

The project aims to convert an existing accessory structure at the rear of the property into an ADU, complying with California government code requirements. This conversion is particularly relevant due to the Housing Crisis Act of 2019, which mandates that any unit removed must be replaced, a requirement the project fulfills by replacing the second-floor flat with the new ADU. The applicant emphasized that the merger request is driven by the need for more space for their growing families, as the existing units are no longer sufficient.

Support for the project was voiced by five nearby neighbors, who highlighted the benefits of increased occupant capacity and the addition of the ADU. The Planning Department recommended approval of the conditional use authorization, noting that while the removal of residential units is generally discouraged, the creation of family-sized housing is a significant factor in this case. The project is expected to increase the total number of bedrooms and residential square footage on the property, aligning with the city's housing objectives.

However, the proposal faced opposition from several community members and organizations. Critics argued that removing a family-sized unit in a city grappling with a housing shortage contradicts established planning policies. Concerns were raised about the net loss of housing space, as the proposed ADU is significantly smaller than the flat being removed. Opponents also pointed out that the project undermines the residential flat policy, which aims to preserve existing family-sized units.

During the meeting, commissioners expressed mixed sentiments. Some supported the project, citing the need for accessible housing options and the overall increase in bedroom count. Others voiced concerns about the implications of merging units and the potential long-term effects on housing availability in the city.

Ultimately, the commission voted on the proposal, passing it with a 4-3 majority, contingent upon the condition that the ADU must be constructed before the merger of the existing units is finalized. This decision reflects a balancing act between addressing immediate housing needs and adhering to established planning policies. The project sponsor and supporters view this as a step towards accommodating growing families in San Francisco, while opponents remain wary of the broader implications for the city's housing landscape.