California SB 6: Multifamily Housing on Commercial Sites and 2033 Sunset

California SB 6, the Middle Class Housing Act of 2022, allows housing to be built on land zoned for office, retail, or parking without a traditional rezoning. The law took effect on July 1, 2023, and sunsets on January 1, 2033.¹ Rather than inventing a new approval track, it makes qualifying commercial-site projects eligible for existing streamlining tools, including SB 35 ministerial approval and the Housing Accountability Act. In exchange, projects must meet density, labor, and site-eligibility rules written into Government Code Section 65852.24.

Which Parcels Qualify

A parcel qualifies if office, retail, or parking is a principally permitted use on it. The project can be all residential, or mixed-use so long as at least 50 percent of the new square footage is housing. Hotels, motels, and other transient lodging cannot be part of a mixed-use SB 6 project, though residential hotels are allowed.²

The site must be 20 acres or less. Regional malls are the exception and can run up to 100 acres. The parcel also has to sit within a U.S. Census Bureau–designated urban area. For a city parcel, the city’s boundaries need to include at least part of a Census urban area. For unincorporated land, the entire parcel must fall inside those urban boundaries.²

What Disqualifies a Site

A site does not qualify if it sits on, or next to, land where more than one-third of the square footage is in industrial use. Parcels separated only by a street or highway count as adjoining. Industrial use covers land that is currently used for industrial activity, was most recently permitted for it, or was designated industrial in the local general plan adopted before January 1, 2022.²

SB 6 also leaves environmental law intact. The statute states it does not weaken CEQA, the California Coastal Act, or other housing, environmental, and labor laws.² Unlike AB 2011, SB 6 does not exempt projects from CEQA review.³ That is the single biggest practical limit on the law. Expect the environmental analysis to run alongside or before the land-use application and to drive the real timeline.

Density and Design Standards

An SB 6 project has to meet or exceed the density the state considers appropriate for lower-income housing in that jurisdiction. The specific threshold is set by the formula in Government Code Section 65583.2, which varies by jurisdiction type.² In practice, that pushes SB 6 projects toward multifamily buildings rather than low-density housing.

Zoning, parking, design, and other standards come from the local residential zone that permits housing at the required density. When a jurisdiction has more than one zone that hits the threshold, the standards from the closest qualifying parcel apply. If the site’s existing zoning already allows residential use at a higher density, those more generous standards control instead.²

Every applicable standard must be objective. That means measurable rules like floor area ratios, setbacks, and height limits, not subjective judgments about architectural style or neighborhood character. Discretionary design review, long a chokepoint for California housing proposals, loses its grip on these projects.

Labor Requirements and Penalties

Every SB 6 project, regardless of size, must pay construction workers at least the prevailing wage for their trade and area, as determined by the Director of Industrial Relations. The developer certifies to the local agency that workers will be paid at prevailing rates and that apprentices will receive at least the applicable apprentice rate.²

Projects also need a skilled and trained workforce for all construction work, meaning workers from registered apprenticeship programs or equivalent training. There is a narrow carve-out. If a developer solicits bids from prequalified prime contractors committed to a skilled and trained workforce and gets fewer than two bids back, the contract can be rebid without that requirement applying to the prime’s scope. With two or more qualifying bids, the mandate applies to all contractors and subcontractors.²

Penalties are real. A contractor or subcontractor that fails to use a skilled and trained workforce faces a civil penalty of $200 per day for each worker in violation. Developers must file monthly compliance reports with the local agency, and a missed report costs $10,000 per month.² On a mid-sized project, those costs add up quickly enough to swallow a developer’s margin.

Approval Pathway and Timelines

SB 6 does not create its own approval process. It makes qualifying projects eligible for SB 35 ministerial approval and Housing Accountability Act protections.⁴ Ministerial review means no public hearings, no discretionary vote by the planning commission or council, and no CEQA review at the approval stage itself.

SB 35 timelines run on project size:

150 units or fewer: the local agency has 60 days to flag inconsistencies with objective standards, and 90 days total to approve or deny.
More than 150 units: 90 days for the consistency review, 180 days total for a decision.

If the local agency misses the consistency window, the project is deemed to satisfy all objective planning standards.⁵ That default-approval mechanism is where the leverage lives.

One caveat worth repeating. Ministerial approval covers the land-use decision, not the environmental clearance. CEQA review still applies, and it generally happens before or alongside the application.

SB 6 or AB 2011?

AB 2011, the Affordable Housing and High Road Jobs Act of 2022, passed in the same session and covers similar ground. The choice between them turns on a few differences:

CEQA: AB 2011 projects are exempt. SB 6 projects are not.
Affordability: AB 2011 requires specific below-market-rate percentages (for example, 8 percent very-low-income and 5 percent extremely-low-income for mixed-income rental projects). SB 6 has no state affordability mandate, though local inclusionary ordinances still apply.
Approval: AB 2011 has its own ministerial pathway. SB 6 uses SB 35.
Labor: both require prevailing wages. SB 6 requires a skilled and trained workforce. AB 2011 has its own workforce rules, including apprenticeship participation and health care contributions for projects over 50 units.
Mixed-use: SB 6 requires at least 50 percent residential square footage. AB 2011 applies to multifamily housing developments on qualifying commercial parcels.

The CEQA exemption usually makes AB 2011 the faster path. SB 6’s draw is flexibility: no state affordability requirement and a broader definition of qualifying mixed-use projects. When a site qualifies under both, the trade-offs get weighed against the specific project.⁴

When a City Can Opt a Parcel Out

A city or county can exempt specific parcels from SB 6, but only through written findings supported by substantial evidence showing no net loss of residential density in the jurisdiction. The agency either reallocates the lost density to other sites or shows that existing residential-zoned sites at or above the required density can already absorb it.²

Both the exempted parcel and the receiving sites must already allow residential development by right. An agency cannot push density onto a site that itself requires discretionary approval for housing, which keeps the exemption from becoming a way to shuffle capacity onto paper sites that will never be built.²

The 2033 Sunset

SB 6 is not permanent. The statute expires on January 1, 2033, unless the Legislature extends it.¹ Projects not entitled before that date could lose their SB 6 eligibility. For anyone still in site acquisition, that deadline is closer than California development cycles tend to accommodate.

1
California Legislative Information. SB 6 Bill Navigation
2
California Legislative Information. California Government Code 65852.24
3
California Department of Housing and Community Development. Middle Class Housing Act (SB 6)
4
Association of Bay Area Governments. Overview of AB 2011 and SB 6
5
California Department of Housing and Community Development. Updated Streamlined Ministerial Approval Process