Planning Commission debates ADU size and project redesign requirements

The San Francisco City Commission convened on July 4, 2025, to discuss a proposed project involving the development of an Accessory Dwelling Unit (ADU). The meeting focused on the design and size of the ADU, with various commissioners expressing their views on how to proceed.

The discussion began with Commissioner Imperial and President Tanner advocating for a redesign of the project to better align with the city's future housing goals. A suggestion was made to have staff collaborate with the architect to adjust the ADU's size, potentially establishing a minimum square footage requirement. The idea was to ensure that the ADU could fit within the existing site constraints while meeting the city's housing needs.

Commissioner Diamond raised questions about the feasibility of increasing the ADU's size without expanding it to a second story, given its current design occupies nearly the entire floor. The architect clarified that any increase would require excavation at the back of the lot, maintaining the unit's single-story structure.

As the discussion progressed, several commissioners expressed their support for the project as it stood, emphasizing the importance of smaller units for affordability. Commissioner Fung highlighted that smaller ADUs could be more desirable from a citywide perspective.

A motion was proposed to continue the discussion and increase the ADU size to 800 square feet, with a focus on equitable distribution among the four proposed units. However, this motion ultimately failed to pass, with several commissioners voting against it.

Following the failed motion, Commissioner Coppell proposed to approve the project as originally presented, citing zoning constraints and the existing design's occupancy of the lower floor. This motion received a second, and after further deliberation, it was put to a vote.

The meeting concluded with the commission moving forward with the approval of the project as proposed, reflecting a balance between the need for additional housing units and the limitations imposed by zoning regulations. The commission's decision underscores the ongoing challenges in addressing housing needs within the city while adhering to existing guidelines.