What Is CEQA—and Does It Really Block Housing in California?

The California Environmental Quality Act (CEQA, pronounced “SEE-kwa”) is a state law that requires California and local governments to study how a proposed construction project will affect the environment and public health—and to tell the public what they find—before the project gets approved.

Signed into law in 1970 by Governor Ronald Reagan, CEQA makes sure that environmental impacts of projects are shared publicly so communities aren’t in the dark. When a company wants to put a landfill, an oil well, or a chemical plant near your neighborhood, CEQA makes sure that you find out before the bulldozers arrive and gives you a way to ask for changes before development starts.

What does CEQA actually do for me?

In practice, the California Environmental Quality Act does three things for everyday Californians:

1. You get told. Projects that could affect air quality, water, or safety have to be studied and disclosed publicly. No one can quietly permit a facility next to your kid’s school.
2. You get a say. CEQA creates a formal window for residents to comment, ask questions, and raise concerns that the agency has to respond to on the record.
3. Problems get fixed before they’re built. When a review turns up a real hazard—contaminated soil, unsafe evacuation routes, pollution loading onto an already-burdened neighborhood—the project has to address it.

Most of the time, this happens quietly and the project moves forward better than it started. 

Where has CEQA made a difference?

Before the California Environmental Quality Act was in place, there were tragic examples of what happens when developers have no accountability for building sustainably: drinking water being polluted with toxic chemicals, critical habitats being forever destroyed, pollution so bad in waterways that they would catch on fire, and high cancer rates in communities of color because of environmental racism. 

Here are two places in California that changed for the better because of California Environmental Quality Act protections:

Cudahy: a school on a chemical waste site

In 2019, a charter school operated by a private management company announced plans to build a new elementary school in the city of Cudahy. Cudahy is one of the most densely-populated cities in the Los Angeles Basin. It’s also located in one of the most polluted counties in the entire state, and more than 97% of the population identifies as Hispanic or Latino. Two of Cudahy’s five schools sit directly adjacent to, or on top of hazardous chemical waste sites.

The site the company proposed for the school had been used for more than 90 years to hold large storage drums for deadly, carcinogenic chemicals and pollutants. To make matters worse, the Cudahy city government decided that the school construction project should skip environmental review entirely.

But the residents of Cudahy joined together and sued the charter school company in 2020, bringing together social, religious, and civic leaders from across their community to form the Cudahy Alliance for Justice. It wasn’t an easy fight, but in January of 2022, the Cudahy community won. Thanks to CEQA, the city and developers weren’t just required to conduct an environmental review—they were required to clean up the site and make it safe for children to occupy five days a week.

Lake Tahoe: protecting water, air, and wildfire safety

Lake Tahoe’s water quality falls under the Tahoe Regional Planning Agency (TRPA), but complicated jurisdiction lines mean that there are areas around the lake that aren’t governed by TRPA. When developers and corporations want to undertake projects just outside those borders that could impact the safety of Tahoe’s communities and quality of its water, CEQA is often the only tool residents have to fight back. It’s already been used in landmark court cases that stopped developers from misrepresenting how their projects would affect the lake and local communities, including: 

• A decade-long fight over the wildfire danger and water quality issues posed by a ski resort development in Lake Tahoe, won in September 2021 (Sierra Watch v. Placer County)
• Protecting forest land that would have been rezoned for development despite having a major impact on wildfire evacuation routes and failing to plan for lowering emissions in the project, won in February 2022 (League to Save Lake Tahoe Mountain Area v. City of Placer)

Does CEQA block housing in California?

The most common criticism of the California Environmental Quality Act alleges that it’s a barrier to development, especially for much-needed housing development in California. While California’s housing shortage is a major crisis, the reality is that CEQA actually works to move beneficial projects forward while also making sure they’re doing safely and sustainably for the people around them.

The numbers simply don’t support the claim that CEQA blocks housing in California. In 2023, the Rose Foundation and The Housing Workshop published an analysis of every CEQA lawsuit filed in California between 2019 and 2021. Here’s what they found:

Are CEQA lawsuits increasing every year?

No. California’s population has grown substantially over the past two decades, but the annual number of CEQA lawsuits has stayed flat. The rate of litigation—lawsuits as a share of projects reviewed—remains very low. (CEQA By the Numbers, page 7)

Who actually files CEQA lawsuits?

Most CEQA lawsuits filed between 2019 and 2021 came from environmental organizations and community advocacy groups. They generally resulted in changes that reduced a project’s harmful impacts on their local environment and the neighboring community, not in projects being canceled. (CEQA By the Numbers, pages 7-8)

Is CEQA mostly used against housing?

No. Fewer than 25% of projects challenged under CEQA were new housing units. The most common target was industrial projects with significant pollution and public health risks. (CEQA By the Numbers, page 8)

Does CEQA stop apartments and density?

The opposite, statistically. CEQA challenges were filed against undeveloped rural sprawl at nearly twice the rate they were filed against urban infill. In unincorporated parts of California, CEQA is frequently the only mechanism residents have to demand transparency about a project near their homes. (CEQA By the Numbers, pages 8-9)

What changed in 2025 for CEQA?

In June 2025, the Legislature passed AB 130 and SB 131 as budget trailer bills—fast-moving measures attached to the state budget, with limited public input. Together they created the broadest set of CEQA exemptions in the law’s history, including a loosely defined carve-out in SB 131 for “advanced manufacturing” facilities.

We wrote about what those changes mean in our breakdown of the CEQA rollbacks.

Since then, lawmakers have been working to narrow the exemptions that went furthest. SB 954 (2026) would restore protections for sensitive habitat, add labor standards, and tighten the definition of which facilities qualify. You can track it and our other priority bills on our 2026 priorities page.

Is CEQA popular with Californians?

Yes—across party lines. Polling conducted by FM3 Research in March 2026 found that 72% of California voters approve of CEQA’s environmental review requirements, and 64% disapprove of the advanced manufacturing exemption created by SB 131. Support held steady across parties, regions, and age groups.

What can I do?

CEQA’s future is decided by the people you elect. The most useful thing you can do is find out where yours stand.

Our California Environmental Scorecard grades every state legislator and the Governor on their climate and environmental votes each year, including their votes on CEQA.

See how your lawmaker voted →