Supervisor Mandelmann proposes ordinance to limit large residential developments in San Francisco

The San Francisco County government meeting on July 4, 2025, focused on a significant ordinance aimed at addressing the growing issue of oversized residential developments in the city. The proposed legislation, introduced by Supervisor Mandelmann, seeks to amend the planning code and zoning map to establish a special use district in central neighborhoods, specifically targeting large residential projects.

The ordinance aims to preserve neighborhood character and affordability by requiring conditional use authorization for new residential developments exceeding 3,000 square feet. It also prohibits any single residential unit from exceeding 4,000 square feet, with some exceptions for property owners who can demonstrate specific hardships. This initiative responds to concerns about the trend of converting smaller, older homes into large luxury residences, which has contributed to the city's ongoing affordability crisis.

During the meeting, Supervisor Mandelmann highlighted the detrimental impact of these conversions, noting that many existing homes are being replaced by multi-million dollar mansions, further eroding the city's affordable housing stock. The ordinance is designed to encourage more modestly sized units that are accessible to middle-income households, particularly in neighborhoods like Noe Valley, Dolores Heights, and Glen Park.

Public comments during the meeting reflected strong community support for the ordinance, with many residents expressing concerns about the ecological impact and the changing character of their neighborhoods due to oversized homes. Advocates emphasized the need for controls on large developments to maintain the community's integrity and affordability.

The planning department's representative noted that the ordinance had undergone several revisions based on feedback from the planning commission and community stakeholders. The commission had previously recommended disapproval of earlier versions but supported the refined approach that focuses on specific neighborhoods rather than a citywide application.

The meeting concluded with a unanimous vote to recommend the amended ordinance to the full board, marking a significant step toward regulating residential development in San Francisco and addressing the pressing issue of housing affordability. The next steps will involve further discussions and potential approval by the full board of supervisors.