San Francisco Planning Commission approves updated ADU ordinance to align with state laws

In a pivotal meeting held on July 4, 2025, the San Francisco City Commission convened to discuss the state-mandated accessory dwelling unit (ADU) ordinance, a significant legislative effort aimed at addressing the city's housing crisis. The ordinance, introduced by the mayor, seeks to align local regulations with recent changes in state law, particularly regarding the construction and approval processes for ADUs.

The meeting featured key presentations from city officials, including Natalia Kwiatkowski, the ADU coordinator, and zoning administrator Corey Teague. They outlined the ordinance's main objectives, which include clarifying the ministerial review process for ADUs and incorporating modifications recommended by the Historic Preservation Commission. Notably, the ordinance proposes a reduction in the maximum size for certain detached ADUs from 1,200 square feet to address concerns about mid-block open space.

A significant change in the ordinance allows property owners to apply for both an ADU and a junior ADU on the same lot, a shift from previous regulations that permitted only one or the other. Additionally, the ordinance introduces a new 16-foot height limit for certain ADUs, ensuring compliance with state law while providing clearer guidelines for construction.

Public comments during the meeting reflected a mix of support and concern. Some speakers praised the city staff for navigating the complexities of overlapping state and local laws, while others expressed frustration over perceived limitations in the proposed ordinance. Concerns were raised about the affordability of ADUs, with some advocates calling for more robust measures to ensure these units remain accessible to low-income residents.

Commissioners engaged in a thorough discussion about the implications of the ordinance, particularly regarding its potential impact on open space in densely populated neighborhoods. While many supported the ordinance's intent to increase housing availability, there was a shared concern about balancing density with the preservation of mid-block open spaces.

Ultimately, the commission unanimously approved the ordinance with modifications, signaling a commitment to enhancing the city's housing stock while addressing community concerns. As San Francisco continues to grapple with its housing challenges, this ordinance represents a crucial step toward creating more affordable living options in the city. The ongoing dialogue among city officials, residents, and housing advocates will be essential in shaping the future of ADUs and their role in San Francisco's urban landscape.