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Planning commission backs citywide ADU rules with modifications after hours of debate
Summary
After hours of testimony and detailed debate, the Planning Commission recommended approval of citywide accessory dwelling unit (ADU) legislation with modifications including no cap on ADUs in larger buildings, minimum unit size safeguards and further study of condominium/subdivision issues; commissioners also kept seismic ADU incentives and struck some retroactivity on eviction rules.
The San Francisco Planning Commission voted to recommend approval of citywide legislation to legalize accessory dwelling units (ADUs) across the city, adopting staff modifications and additional commissioner amendments intended to balance housing production with tenant protections.
The package on the table included competing ordinances introduced by Supervisors Peskin, Weiner and Farrell. Planning staff laid out recommendations aimed at maximizing feasible ADU production while limiting misuse: allowing ADUs citywide but adding controls on merger, eviction history, limits in certain historic districts and rules on subdivision and sale in some contexts.
"We support ADUs as an important strategy to add housing units in existing residential buildings," Planning staff said, while also noting potential tradeoffs and enforcement challenges. Commissioners and dozens of public speakers debated technical points for hours: whether to remove caps for larger buildings, whether ground‑floor retail can be converted partially to ADUs, whether a history of no‑fault evictions should disqualify buildings retroactively, and whether ADUs should be condominium‑eligible.
What the commission did: The commission voted (4–1) to recommend approval with modifications. Key changes the commission adopted included: removing unit caps for buildings with five or more existing units (to encourage density on larger parcels); adding a minimum unit size requirement to avoid micro‑units; preserving seismic retrofit ADU incentives; and asking staff to study condominiumization/subdivision options further before making a final rule on saleability.
Why it matters: Advocates argued ADUs are a fast, low‑impact way to add naturally affordable units; opponents warned that without careful rules ADUs could erode tenant protections or spur speculation. The commission's modifications try to steer the program toward adding family‑sized, livable units while limiting gaming of eviction history and short‑term rental conversion.
Next steps: The resolution and amended draft ordinance will move to the Board of Supervisors, where staff and supervisors will continue to work out numeric floors and technical language for minimum 3‑bedroom floors and other details.
