Sunday, 20 September 2026
San Francisco has substantially expanded the amount of housing that can be developed across the city, but changing planning rules is proving easier than making new projects financially viable. The Family Zoning Plan, which took effect in January 2026, allows considerably more residential development in parts of northern and western San Francisco. Yet the first months under the new framework have produced relatively limited development activity, highlighting the gap between permission to build and the economics required to turn that capacity into actual homes.
The problem is particularly striking because demand for rental housing is strong. Professional estimates place San Francisco multifamily vacancy at roughly 2.4% to 4%, depending on the properties and methodology included in each survey. Rents are also rising sharply, with some market studies recording double-digit annual growth across San Francisco and the Peninsula. Across the wider Bay Area, apartment absorption substantially exceeded new completions during the second quarter, indicating that households are occupying available units considerably faster than developers are adding new supply.
Normally, falling vacancy and rising rents would be expected to encourage construction. In San Francisco, however, development costs remain a major obstacle. Land prices, construction expenses, financing costs, development charges and affordable-housing obligations all influence whether a project can generate sufficient returns to secure investment and debt financing. The city’s own 2026 economic review demonstrated how difficult that calculation has become, finding that most of the development scenarios examined struggled to produce financially workable results under prevailing market conditions.
San Francisco has begun responding by reducing some of the costs it controls. Changes introduced in August lowered affordable-housing obligations for qualifying projects, removed those requirements for developments containing fewer than 25 homes and reduced most development impact fees by 67%. The measures are intended to improve the economics of projects that already have planning potential but cannot attract sufficient capital to move into construction. They also create an important test for the market: whether reducing regulatory costs can unlock development when construction and financing remain expensive.
Evidence of the backlog is substantial. Industry research estimates that thousands of entitled homes remain unable to progress despite having cleared important stages of the planning process. This suggests that San Francisco’s housing challenge cannot be resolved simply by allowing taller or denser buildings. Rezoning increases the theoretical value and development potential of land, but a project will still remain on paper if expected rents or sales revenues cannot cover land acquisition, financing, construction, fees and the return required by investors.
The issue is becoming increasingly urgent because San Francisco faces an important housing target early next year. Under the city’s Housing Element, if building permits have been issued for fewer than 29,049 homes by 31 January 2027, additional measures must follow. These could include further increases in residential development capacity and additional reductions in constraints affecting housing production. The deadline effectively provides a test of whether the reforms already introduced are translating into sufficient permitting activity or whether another round of intervention will be necessary.
San Francisco is therefore approaching an unusual point in its housing crisis. The city has strong apartment demand, low vacancy, rising rents and substantially greater development capacity than before, yet those conditions have not automatically produced a construction boom. The next stage of the housing debate will increasingly be determined not by how many homes planning rules theoretically allow, but by how many developers can actually finance and build. If projects continue to remain uneconomic despite rezoning and lower municipal charges, San Francisco may discover that solving the regulatory side of its housing shortage was only the beginning.
Source: CIJ.World Research & Analysis Team
