San Francisco's Board of Supervisors voted to place a new excise tax on the November 3, 2026 ballot, one that would apply beginning tax year 2027 to owners keeping vacant, or converting to a different use, any parcel that was last used, in whole or in part, as a formula-retail grocery store or formula-retail pharmacy on or after January 1, 2017. It is the first vacancy tax anywhere in the country targeted at a specific anchor-tenant category, and it's aimed directly at the Walgreens and CVS departure pattern Plat Street mapped in Issue 2's Pharmacy Box coverage.

The design detail that will define the entire campaign sits in six words: "or using differently." The measure doesn't just tax vacancy. It taxes conversion away from grocery or pharmacy use. That means a landlord who successfully re-tenants a former Walgreens with a gym, a medical office, or almost any other productive use could still owe the tax, simply because the space is no longer serving its original retail category. That structure cuts directly against the corridor-activation instinct that drives most of Plat Street's Frontage and Block Ops coverage, where the entire premise is that filling a vacant anchor with something, almost anything, beats leaving it empty.

The politics this sets up inside affected corridors are genuinely unpredictable. A merchant whose neighboring pharmacy sat vacant for years might reasonably support any tax that pressures the landlord to act. That same merchant might just as reasonably oppose a tax that discourages the landlord from filling the space with a use that actually drives foot traffic past their own storefront, if that use happens not to be a grocery store or pharmacy. Corridor coalitions that have been unified around vacancy taxes generally, including Baltimore's, may find themselves genuinely split on this specific design.

Watch line: The legal analysis of the "using differently" clause as the campaign develops, and which coalitions form for and against a tax that specifically penalizes a landlord for filling a vacant box with anything other than a pharmacy or grocery store.

Duplicate check: New policy. Extends the Pharmacy Box franchise from Issue 2 and connects directly to Plat Street's broader Vacancy Policy Frontier reporting.