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Planning Commission approves 4‑story addition and office‑allocation for 300 California St., 5–1
Summary
The Planning Commission granted exceptions and authorized 56,459 square feet of office allocation for a four‑story vertical addition at 300 California Street, with design conditions and a requirement that the sponsor return for an informational presentation; the vote passed 5–1 with Commissioner Moore dissenting.
The Planning Commission on Dec. 5 voted 5–1 to authorize a four‑story vertical addition to an existing 8‑story office building at 300 California Street and to allocate 56,459 gross square feet of downtown office floor area from the city’s large‑office cap.
Staff framed the request as a downtown project authorization under Planning Code Section 309 seeking exceptions for tower separation, wind impacts and off‑street loading; the department recommended approval with conditions. The project sponsor described a four‑story rooftop addition with a rooftop public open space, streetscape improvements including a widened sidewalk and new glazing at the ground level, and an overall goal of retaining and reusing the existing structure rather than demolition.
Commission debate centered on design integration: several commissioners praised the project’s improvements to the ground floor and the principle of adaptive reuse, while others — led by Commissioner Moore — questioned whether the addition properly addressed downtown plan guidance on sculpting taller buildings and achieving adequate tower separation and setbacks. Moore said the proposal "sets a bad example" for the downtown core and urged deeper structural and design analysis before granting exceptions; other commissioners said practical constraints (existing core location, structural upgrades already performed) limited setback options and encouraged staff and the sponsor to pursue facade refinements.
Commissioner Antonini moved to approve both the Section 309 exceptions and the office allocation with conditions requiring continued staff review and an informational presentation on any subsequent design changes. The motion passed: Antonini, Borden, Hillis, Sugaya and Chair Wu voted yes; Commissioner Moore voted no; Commissioner Fong was absent. Approval included conditions that the sponsor continue to work with planning staff on further integration of the new addition with the existing facade and return to the commission for an informational update when refinements are ready.
What’s next: The project sponsor will continue design work with staff to refine the facade integration and will present an informational update to the commission when changes are available; building permits and follow‑on approvals proceed as required by the Planning Code.
