California SB 423: Ministerial Approval, Eligibility, and Deadlines

California SB 423 extends and strengthens the streamlined housing approval process first created by SB 35, letting qualifying multifamily projects receive ministerial approval without public hearings, discretionary review, or review under the California Environmental Quality Act. The law applies in cities and counties that have fallen short of their Regional Housing Needs Allocation targets and stays in effect until January 1, 2036.¹ If a project checks every box in the statute, the local planning director must approve it.

How Ministerial Approval Works Under SB 423

Ministerial approval means a project is judged only against objective, published standards. A city or county cannot impose subjective conditions, require a conditional use permit, or demand any other nonlegislative discretionary approval.² There is no public hearing, no neighborhood notification requirement, and no CEQA review.³

That last piece is the one that changes the math for most developers. CEQA has historically been where housing projects lose years and rack up litigation costs, and the exemption removes that entirely for qualifying projects.

Where SB 423 Applies

Streamlining is not available statewide. It applies only in jurisdictions where the latest production reports show the locality has issued fewer building permits than required under its RHNA, for either lower-income or market-rate housing. In a city like San Francisco, which has fallen short at both income levels, even market-rate projects that meet the eligibility criteria can use ministerial review.³

Which Projects and Sites Qualify

The development must be multifamily, contain two or more residential units, and dedicate at least two-thirds of its square footage to residential use.²

The site itself must meet all of the following:

It is a legal parcel within a city whose boundaries include part of an urbanized area or urban cluster.
At least 75 percent of its perimeter adjoins parcels already developed with urban uses.
It is zoned for residential or residential mixed-use, has a general plan designation allowing residential use, or qualifies under the Middle Class Housing Act of 2022 (SB 6) for office or retail sites.

The project must be consistent with every objective zoning, subdivision, and design review standard in effect when the application is submitted. Those standards can be modified only through the density bonus, incentives, concessions, waivers, or parking reductions available under the State Density Bonus Law.²

Sites That Are Off-Limits

SB 423 excludes a long list of locations regardless of how well a project otherwise fits:

Prime farmland, farmland of statewide importance, or land protected by a voter-approved agricultural preservation measure.
Wetlands, as defined by the U.S. Fish and Wildlife Service Manual.
Very high fire hazard severity zones and state responsibility areas, unless the project adopts fire hazard mitigation measures under applicable building and fire codes.
Hazardous waste sites listed under Government Code Section 65962.5 or designated by the Department of Toxic Substances Control, with limited exceptions for cleaned-up underground storage tank sites.
Flood zones, earthquake fault zones, and conservation lands.

Coastal zone parcels have their own overlay of rules, covered further down.⁴

Affordability Requirements

Every SB 423 project has to include below-market units. The floor depends on tenure and location:

Rental projects: at least 10 percent of total units, before any density bonus, affordable to households at or below 50 percent of area median income.
For-sale projects: at least 10 percent of total units, before any density bonus, affordable to households at or below 80 percent of area median income.
Bay Area alternative: projects may instead dedicate 20 percent of total units to households below 100 percent of AMI, with the average income of those units at or below 80 percent.

If a local inclusionary ordinance requires a higher percentage, the local ordinance controls. In jurisdictions that have specifically fallen short on lower-income housing production, a separate track requires 50 percent of units to be affordable to households at or below 80 percent of AMI.⁵

The affordability covenant is recorded before the first building permit issues. Rental restrictions run for at least 55 years; ownership restrictions run for at least 45 years.² Both belong in a project pro forma from the beginning.

Tenant and Demolition Protections

SB 423 will not approve a project that requires demolishing any of the following:

Housing restricted by a recorded covenant, ordinance, or law to affordable rent levels.
Housing subject to any form of rent or price control.
Housing that has been occupied by tenants within the past 10 years.
A historic structure listed on a national, state, or local historic register.

The 10-year lookback attaches to the site as well as to standing structures. If housing on the parcel was occupied by tenants and then demolished within 10 years before the application, the project is out. The same is true for properties containing occupied units offered for sale as subdivisions.⁶ Clearing tenants and then filing under SB 423 does not work.

Approval Deadlines Local Governments Must Meet

SB 423 puts local governments on a clock. After the application is submitted, the jurisdiction must either confirm the project’s consistency with objective standards or provide written documentation of the specific conflicts within these windows:

60 days for projects with 150 or fewer units.
90 days for projects with more than 150 units.
30 days for a resubmitted application addressing prior feedback.

When a project also requires design review, the overall approval timelines stretch to 90 days for projects with 150 or fewer units and 180 days for larger projects. Post-approval modification requests must be acted on within 60 days, or 90 days if design review is involved.⁵ Every department whose approval is needed before an entitlement issues has to meet the same deadlines, so one slow desk cannot hold the whole project.

Labor and Prevailing Wage Rules

SB 423 restructured the labor piece inherited from SB 35. Rather than treating wage and workforce standards as objective planning criteria, SB 423 requires the developer to certify to the local government that specified labor standards will be met. Enforcement runs through the Labor Commissioner.¹

The obligations scale with project size:

Projects with more than 10 units that are not entirely a public work must pay all construction workers at least the general prevailing rate of per diem wages for the type of work and geographic area. Contractors and subcontractors must maintain and verify payroll records and make them available for inspection.
Projects with 50 or more units add further requirements. Every contractor employing construction craft workers for at least 1,000 hours must participate in a state-approved apprenticeship program or request dispatch of apprentices from one. These contractors must also make health care expenditures for each construction employee.

Contractors covered by a valid collective bargaining agreement that already requires prevailing wages, registered apprentices, and health care expenditures are deemed in compliance. Prevailing wage obligations can be enforced through civil actions by the Labor Commissioner, underpaid workers, or joint labor-management committees, and violations trigger liquidated damages against the contractor, subcontractor, and any surety on a bond securing the covered wages.⁷

Coastal Zone Projects

Beginning January 1, 2025, streamlined ministerial approval reaches eligible sites in the coastal zone, but with a long list of carve-outs.⁸ Streamlining is not available for:

Areas subject to the Coastal Commission’s geographic appeal jurisdiction.
Areas without a certified local coastal program or certified land use plan.
Areas vulnerable to five feet of sea level rise, as determined by NOAA, the Ocean Protection Council, USGS, the University of California, or a local coastal hazards assessment.
Parcels not zoned for multifamily housing.
Parcels within 100 feet of a wetland, or on prime agricultural land as defined in the Coastal Act.

Eligible coastal projects still need a Coastal Development Permit, but the standard shifts. The local government or Coastal Commission must approve the permit if the project is consistent with the objective standards of the certified local coastal program, and neither body can deny or condition the project on subjective standards.⁸

Tribal Consultation Before Filing

Every SB 423 applicant has to complete tribal consultation before the application is submitted. Skipping it renders the application incomplete.³

The developer files a Notice of Intent with the local government, which then contacts the Native American Heritage Commission to identify any California Native American tribe traditionally and culturally affiliated with the project area. Within 30 days of receiving the Notice of Intent, the local government sends formal notice to each identified tribe, including a project description, the location, and an invitation to a scoping consultation. Each tribe has 30 days to accept, and if a tribe accepts, the local government must begin consultation within 30 days of that response.²

The consultation must recognize that affiliated tribes hold knowledge and expertise about the cultural resources involved. In practice, the process can add several months, so filing the Notice of Intent early in planning is the safe move.

1
California Legislative Information. California Senate Bill 423 – Land Use: Streamlined Housing Approvals: Multifamily Housing Developments
2
California Legislative Information. California Government Code 65913.4
3
SF Planning. Streamlined Multifamily Housing Approval (SB 423)
4
California Legislative Information. California Government Code 65913.4
5
California Legislative Information. Today’s Law As Amended – SB-423 Land Use: Streamlined Housing Approvals
6
LegiScan. Bill Text: CA SB423 2023-2024 Regular Session Chaptered
7
Senate Committee on Housing. SB 423 (Wiener) Analysis
8
California Coastal Commission. SB 423 Memo