What Is SB 6 in California? The Middle Class Housing Act

California’s SB 6, the Middle Class Housing Act of 2022, lets developers build housing on land zoned for office, retail, or parking without going through a rezoning. The law took effect July 1, 2023, and applies to every California city, including charter cities, because the Legislature declared it a matter of statewide concern. In exchange for the zoning shortcut, projects have to meet state rules on site eligibility, density, construction labor, and payments to displaced commercial tenants.¹

What the Law Does

SB 6 makes housing a permitted use on commercially zoned land. If a parcel sits in a zone that already allows office, retail, or parking as a principal use, a qualifying housing project is automatically allowed there too. No rezoning, no use permit variance, no special entitlement. The project just has to satisfy Government Code Section 65852.24.¹

The underlying commercial zoning stays in place. A qualifying developer builds as if the parcel were already zoned residential at the required density, using the standards of the closest residential zone that permits that density. If the existing commercial zoning already allows residential at a higher density, that higher density controls.

SB 6 does not override the California Coastal Act, CEQA, the Housing Accountability Act, fair housing law, or local affordability and tenant protection ordinances. And one rule often missed: any rental unit built under SB 6 must be leased for terms longer than 30 days, which rules out short-term vacation rentals.²

Which Sites Qualify

Not every commercial parcel is eligible. Fail any one of the criteria below and the project falls out of SB 6 entirely.

Size, Location, and Neighbors

The site cannot exceed 20 acres. A 2024 amendment carved out one exception: regional malls up to 100 acres qualify if the site has at least 250,000 square feet of permitted retail, at least two-thirds of its permitted uses are retail, and at least two retail tenants occupy 10,000 square feet or more.³

The parcel must be a legal parcel within a Census-designated urban area, and for unincorporated land, the entire parcel must sit inside that urban boundary. The site also cannot adjoin any parcel where more than one-third of the square footage is industrial.

Environmental and Safety Exclusions

SB 6 prohibits development on sites with environmental or safety concerns. Ineligible locations include:

Coastal zones defined under the California Coastal Act
Prime farmland or farmland of statewide importance mapped by the Department of Conservation
Wetlands under the U.S. Fish and Wildlife Service definition
Very high fire hazard severity zones designated by Cal Fire, unless the local agency has excluded the site or the project meets fire mitigation standards
Listed hazardous waste sites, unless cleared for residential use
Earthquake fault zones mapped by the State Geologist, unless the project meets seismic code
FEMA 100-year flood zones

The coastal zone exclusion is unique to SB 6; its companion law, AB 2011, does not carry it. Developers eyeing coastal commercial property will find SB 6 unavailable there.²

Density and Design Rules

SB 6 projects must meet a minimum density: the level the state considers appropriate to accommodate lower-income housing in that jurisdiction under Government Code Section 65583.2. In most urban jurisdictions this works out to around 30 units per acre, though the exact threshold varies.¹

Above that floor, projects have to follow the local zoning, parking, design, and code requirements that would apply to a residential development at the required density. SB 6 doesn’t let developers ignore local building standards. It removes the threshold objection that housing isn’t permitted on the parcel. Inclusionary housing ordinances, impact fees, and design review still apply.

Mixed-use projects qualify too, as long as at least 50 percent of the new construction square footage is residential. The nonresidential share is limited to retail or office.

Labor Standards and Costs

This is where SB 6 picks up costs that developers sometimes underestimate. Two separate certifications are required.

All construction workers must be paid at least the general prevailing wage for their trade and area, as set by the Department of Industrial Relations. Apprentices in approved programs may be paid at the apprentice rate. Projects of 10 or fewer units are exempt from the prevailing wage requirement.⁴

Developers must also certify that a skilled and trained workforce will perform all construction. Noncompliance penalties are specific and cumulative: $10,000 per month for failing to submit a required compliance report, and $200 per day for each worker who does not meet the skilled and trained standard. All penalties go to the State Public Works Enforcement Fund.³

There is a workaround. If a developer sends proper notice to local trade unions and contractor organizations at least seven days before soliciting bids, seeks bids with enforceable skilled-workforce commitments, and still can’t assemble a qualified workforce for a given trade, the developer can award contracts for that trade without the skilled and trained requirement. The notice and bidding records need to be clean because the exception will be scrutinized. Projects covered by a project labor agreement that already requires prevailing wages and skilled workforce standards are exempt from the separate SB 6 reporting.⁴

CEQA Still Applies

SB 6 does not exempt projects from the California Environmental Quality Act. Full CEQA review still applies. This is one of the most important differences between SB 6 and AB 2011, which created a CEQA-exempt ministerial approval path.⁵

In practice, an SB 6 project may need an environmental impact report or mitigated negative declaration before approval, depending on potential effects. That can add months or years and real cost. Developers should budget for environmental review early and look at whether existing CEQA streamlining or infill exemptions apply. The state’s Office of Land Use and Climate Innovation publishes resources on CEQA housing exemptions.⁶

How Projects Get Approved

SB 6 does not create a new approval process. It works by making commercial parcels eligible for existing housing approval tools. The important ones are SB 35 streamlined ministerial approval, available in jurisdictions that have missed their housing production targets, and the Housing Accountability Act, which limits a local government’s ability to deny or down-size a project that meets objective standards. For a compliant SB 6 application on a commercial parcel, those tools leave the local government with limited grounds for refusal.⁷

Local agencies keep one meaningful tool. A city or county can exempt a specific parcel from SB 6 by making written findings, supported by substantial evidence, that meet one of two conditions: either the agency reallocates the lost residential capacity to other parcels so total housing capacity doesn’t drop, or it shows the lost capacity can be absorbed by other sites already allowing residential at the required density. Replacement sites must be suitable and subject to by-right development. The no-net-loss requirement makes this hard to use as blanket resistance.⁴

Payments to Displaced Commercial Tenants

Developers converting occupied commercial property have to pay relocation assistance to existing tenants who have been on the site for at least one year. Amounts scale with length of tenancy:

1 to 4 years: six months’ rent
5 to 9 years: nine months’ rent
10 to 14 years: twelve months’ rent
15 to 19 years: fifteen months’ rent
20 years or more: eighteen months’ rent

Payments are based on the tenant’s current rent. A long-established tenant on a sizeable site can trigger a six-figure payment, and that number belongs in the project feasibility analysis from day one.³

SB 6 Compared to AB 2011

SB 6 and AB 2011 (the Affordable Housing and High Road Jobs Act) both allow housing on commercially zoned land, and both took effect July 1, 2023. They overlap enough that any developer evaluating a commercial site should think about which pathway fits better.

The biggest split is environmental review. AB 2011 is CEQA-exempt and ministerial. SB 6 leaves full CEQA review in place. On complex or contested sites, that difference alone often decides the choice.⁸

Affordability also diverges. AB 2011 requires specific affordability outcomes, with different standards for 100-percent-affordable projects and mixed-income projects on commercial corridors. SB 6 has no independent affordability mandate, though local inclusionary ordinances still apply.⁵

Both laws require prevailing wages. Only SB 6 also mandates a skilled and trained workforce. Both require relocation assistance for displaced commercial tenants. Both share the same list of prohibited development locations, except that SB 6 adds the coastal zone to the restricted list.

What AB 2243 Changed in 2024

AB 2243, signed in 2024, expanded SB 6. The headline change is the regional mall exception to the 20-acre cap, which opens qualifying mall sites up to 100 acres and brings a large category of underperforming enclosed malls into play. AB 2243 also directed the state Department of Housing and Community Development to study SB 6 outcomes twice, with reports due January 1, 2027, and January 1, 2031. Those studies will inform whether the Legislature tightens or loosens the law.³

1
California Legislative Information. California Government Code 65852.24 (2025)
2
California Legislative Information. SB 6 – Local Planning: Housing: Commercial Zones
3
California Legislative Information. AB 2243 – Housing Development: Commercial Zones
4
Legiscan. Bill Text: CA SB6 2021-2022 Regular Session Chaptered
5
City of Gilroy. AB 2011 and SB 6
6
Office of Land Use and Climate Innovation. Site Check and Other CEQA Housing Resources
7
Association of Bay Area Governments (ABAG). AB 2011 and SB 6 Summary of Key Details
8
County of San Diego, Planning and Development Services. SB 6 and AB 2011: Residential Development in Commercial Zones Informational Fact Sheet