SF Lags European Cities on Affordable Housing Delivery — Now Come the Decisions That Will Define the Decade

San Francisco is delivering affordable housing at a pace that trails Vienna, Amsterdam, and Helsinki by a factor of roughly two to one on a per-capita basis, according to a comparative analysis released Thursday by the Urban Displacement Project at UC Berkeley. The report lands as the city faces a state-imposed deadline to zone for 82,069 new units by early 2027 under California's 6th Cycle Regional Housing Needs Allocation — a target it is nowhere close to meeting.

The timing is brutal. Europe is dealing with its own crises — France recorded more than 2,000 excess deaths during a July heatwave this week — but cities like Vienna have maintained a decades-long municipal housing stock, called Gemeindebau, that keeps roughly 60 percent of residents in subsidized units. San Francisco's Below Market Rate inventory sits at around 32,000 units citywide, a figure that has grown by fewer than 1,200 units annually over the past five years.

Where the Pipeline Is Stalling

The bottlenecks are not hard to find. The Balboa Reservoir development in the Ingleside neighborhood — a project that was supposed to deliver 1,100 units, about half of them affordable, on city-owned land adjacent to City College of San Francisco — has been grinding through design and financing reviews since the Board of Supervisors approved it in 2020. Construction had been projected to start in late 2024. It has not started. Meanwhile, the Tenderloin's 30 Otis Street site, a 324-unit 100-percent affordable project run by the nonprofit Tenderloin Neighborhood Development Corporation, is nearly complete but represents the exception rather than the pattern.

The Mayor's Office of Housing and Community Development administers roughly $150 million annually in local affordable housing funds, but that money is leveraged against federal Low-Income Housing Tax Credits that have become fiercely competitive and unpredictable under shifting federal budget priorities in Washington. One-bedroom affordable units in completed projects are typically restricted to households earning 50 percent of the Area Median Income — currently about $64,000 a year for a single person in San Francisco — but market-rate one-bedrooms in neighborhoods like the Mission or Hayes Valley routinely list above $3,200 a month, a gap that defines the crisis.

The Decisions That Come Next

Three choices in the next 18 months will determine whether San Francisco closes any of this gap or watches it widen. First, the Board of Supervisors must vote on a proposed Affordable Housing Density Bonus expansion this fall that would allow 100-percent affordable projects to build taller on parcels currently capped at 40 feet in neighborhoods including the Outer Sunset and the Excelsior. Second, city voters will likely face a November 2026 ballot measure asking them to extend the Prop. I transfer tax allocation — a levy on property sales above $10 million that currently channels money to the Small Sites Program, which has preserved more than 2,000 rent-controlled units since 2014. Third, the Planning Department is scheduled to finalize its Housing Element rezoning map by December 2026, a document that will either concentrate new capacity near Caltrain and BART corridors like the 4th and King Street station and the Balboa Park BART stop, or diffuse it in ways that historically attract legal challenges and slow production.

The UC Berkeley analysis recommends that San Francisco study Vienna's model of cross-subsidization — using revenue from market-rate city-owned commercial leases to fund affordable construction — rather than relying so heavily on the federal tax credit pipeline. The city owns significant underutilized parcels in the Dogpatch and at Pier 70, assets that could theoretically anchor that kind of structure. Whether city hall has the political will to structure deals that complex, on that timeline, is the question officials will spend the rest of this year trying to answer.