California Proposition 45 and CEQA: What It Would Change for Neighbors, Owners and Developers
California voters will decide on November 3, 2026 whether to adopt Proposition 45, the "Building an Affordable California Act." Its official ballot title is "Modifies Environmental Review for Certain Projects. Initiative Statute." If it passes, it would add a new chapter to the California Environmental Quality Act (CEQA), Public Resources Code Sections 21010 through 21034. For projects it calls "essential," it would set deadlines for environmental review, limit the alternatives an environmental impact report must study, and narrow both the claims and the remedies available in a CEQA lawsuit.
This article explains what the measure's text says, not whether to vote for it. It is written for the people most likely to end up in a California courtroom over it: neighbors and homeowners associations that challenge projects, and property owners and developers who propose them. Because it is a ballot measure, every statement below is about what Proposition 45 would do if approved. We will update this page after the election.
- California Proposition 45 (November 3, 2026) is an initiative statute that would add Public Resources Code Sections 21010 to 21034 to CEQA; it does not exempt projects from environmental review, and under proposed Section 21014 public agencies keep their discretion to approve or deny.
- Proposition 45's procedures are generally optional for the project applicant: proposed Public Resources Code Section 21015(a) lets an applicant for an "essential project" use "none, some, or all" of the new chapter, so a neighbor or city cannot invoke it on its own.
- For essential projects whose applicants opt in, proposed Section 21018 would require a California local agency to decide whether to certify an environmental impact report within 365 business days, and whether to adopt a negative declaration within 180 business days, counted from the date the application is determined or deemed complete.
- A CEQA lawsuit against an essential project whose applicant opts into Proposition 45 would generally have to be filed within 30 days after the notice of determination or notice of exemption is filed, would be limited to claims that the agency violated "objective existing laws," and would be directed to be completed within 270 days including appeals (proposed Sections 21026 and 21027).
- Under proposed Section 21027(c), a California court that finds a CEQA violation on an opted-in essential project could not order the agency to rescind its approval; the writ remedy would be limited to barring the noncompliant part, phase or activity from starting until the violation is corrected, with a narrow injunction exception for proven public safety impacts (Section 21027(e)(1)).
What is California Proposition 45, and which projects count as "essential"?
Proposition 45 is a November 2026 California initiative statute that would add a new CEQA chapter for "essential projects." Under proposed Public Resources Code Section 21013, those are essential housing, clean energy, water, public health, public safety, broadband, education facility and transportation projects. Each category has its own definition and exclusions in proposed Section 21028.
Essential housing is broad
Proposed Section 21028(l) lists nine kinds of essential housing project:
- Residential units only.
- Mixed-use development meeting the residential-share tests in Section 21028(y).
- Transitional, emergency shelter or supportive housing.
- Farmworker housing.
- Group living accommodations.
- Student housing.
- Senior housing, if it also qualifies as a "housing development project" under Government Code Section 65589.5(h)(2).
- Subdivisions or common interest developments of residential units or unimproved residential lots.
- Conversion of an existing commercial building to residential use.
A mixed-use project qualifies under Section 21028(y) if at least two-thirds of its new or converted square footage is residential, or if it meets one of two alternative tests that require at least 50 percent residential square footage, at least 500 net new units, no hotel or other transient lodging, and, for the second test, additional demolition and conversion thresholds. The nonresidential portion cannot include heavy industrial, extractive, port, refinery or hazardous materials uses.
Some commercial-to-residential conversions already have their own state pathways with different CEQA treatment; our article on retail-to-residential conversions explains how AB 2011 and SB 6 differ.
What is excluded
Proposed Section 21028(m)(2) excludes, across every category, a project that includes a jail or other detention facility and a project involving a new oil or natural gas production facility. Individual categories carry their own exclusions: Delta conveyance facilities are excluded from water projects, nuclear generation from clean energy, and high-speed rail components from transportation.
The measure's housing definition does not contain the conditions California's 2025 CEQA housing exemption uses. Public Resources Code Section 21080.66, added by AB 130 (Chapter 22, Statutes of 2025) and later amended, exempts qualifying housing only if, among other things, the site is generally 20 acres or less (with a smaller four-acre cap for some projects, including builder's remedy projects), is in an urban or infill location, is consistent with the general plan and zoning, and avoids the sensitive-site exclusions in Government Code Section 65913.4(a)(6). Because Proposition 45 does not create an exemption, it does not include those limits; it changes the procedure for projects that still go through review. Proposed Section 21014(e)(1) states that the new chapter does not limit any existing statutory or categorical exemption.
Proposition 45 also does not rezone land. It changes how CEQA review and CEQA litigation work. Whether a project complies with the zoning code, the general plan or the Housing Accountability Act is a separate question under separate law. Some state laws already take qualifying projects outside CEQA review through ministerial approval, as our article on SB 79 transit upzoning explains.
It is opt-in
Under proposed Section 21015(a), "an applicant may elect to utilize none, some, or all of the provisions of this chapter." A developer that prefers the existing CEQA process can keep it. Tribal consultation under proposed Section 21016 is mandatory for any project that uses the chapter at all, and it is limited to federally recognized tribes that are traditionally and culturally affiliated with the project's geographic area (Section 21028(e)). The measure states that its deadlines do not shorten consultation under existing Sections 21080.3.1 and 21080.3.2.
The measure does not expressly say whether the litigation limits in proposed Sections 21026 and 21027 depend on that election; Section 21026(a)(1) refers to "any action or proceeding" challenging an essential project's approval, so expect that question to be argued.
How fast would a California city have to finish CEQA review under Prop 45?
For an opted-in essential project, proposed Public Resources Code Section 21018 sets four deadlines for a California local agency, all in business days and all running from the date the application is determined or deemed complete: 30 to choose the review track, 365 to decide on an environmental impact report, 180 for a negative declaration, and 90 for an exemption or addendum.
Completeness comes first
Under proposed Section 21017, the agency has 30 calendar days from receipt to decide whether an application is complete; if it does not act, the application "shall be deemed complete for the purposes of this division." An incompleteness letter must include an "exhaustive written corrections list," and the agency may not later add new items. The applicant has 90 days to resubmit, and may appeal an incompleteness finding, with a decision due within 60 days; these periods are calendar days.
The review clock
| Step (Prop 45, if approved) | Proposed section | Time | Unit | Runs from |
|---|---|---|---|---|
| Completeness decision | 21017(a)(2) | 30 | calendar days | Agency's receipt of application |
| Choose review track | 21018(a) | 30 | business days | Application determined or deemed complete |
| Decide whether to certify an EIR | 21018(b) | 365 | business days | Same |
| Decide on a negative declaration or mitigated negative declaration | 21018(c) | 180 | business days | Same |
| Exemption, prior evaluation or addendum | 21018(d) | 90 | business days | Same |
| Hearing after a missed deadline | 21020(b) | 60 | calendar days | Agency's receipt of the applicant's written request |
| Applicant's suit over a missed deadline, denial or unlawful conditions | 21020(g) | 90 | calendar days | The agency's failure, denial or imposition of conditions (the measure does not say when a "failure" occurs) |
Proposed Section 21028(f) defines "day" as a business day for Sections 21018 and 21019 only; everywhere else in the chapter, a day is a calendar day. Section 21019 sets parallel deadlines for state and other nonlocal agencies. Under Section 21018(e), the review deadlines "shall be extended upon written request from the applicant."
A missed deadline is not an approval
Proposition 45 contains no "deemed approved" rule. If the agency misses a deadline, the applicant may request a hearing in writing, and within 60 days of receiving the request the agency must hold a meeting or hearing before its highest-ranking decision-making body (or, if it has none, its highest-ranking official or designee) and make final written determinations on the environmental document and on whether to approve or disapprove the project (proposed Section 21020(b)). The measure calls these deadlines a "nondiscretionary ministerial duty," enforceable by the applicant in court. The agency can still say no. ROMO has written separately about California's existing permit delay and deemed-approved remedies, which work differently.
What the study must cover
Proposed Section 21022 directs that impacts be identified, judged and mitigated "based on compliance with existing laws," defined in Section 21028(r) as laws formally adopted and in effect when the application was submitted, with exceptions for a specific, adverse life-safety impact and for building and fire code updates that take effect before a stated point. An applicant may also elect to lock in the significance thresholds the agency had published, adopted or routinely used.
Under proposed Section 21025, an environmental impact report for an essential project that "complies with this article" would analyze three alternatives: the project, one alternative the applicant develops, and no project. That limit is tied to the optional pre-application scoping process in Section 21024, so it is not automatic for every opted-in project.
Could neighbors and HOAs in California still sue under CEQA if Prop 45 passes?
Yes. Proposition 45 would not bar CEQA lawsuits, but for opted-in essential projects it would shorten the filing deadline to 30 days from a notice of determination or exemption, limit claims to violations of "objective existing laws," limit the record, direct completion within 270 days including appeals, and bar courts from ordering an approval rescinded.
Comments must be in on time
This change may most directly affect a California neighbor or homeowners association. Under proposed Section 21021, comment periods would be 20 calendar days for a negative declaration and 45 calendar days for a draft environmental impact report, and they "shall not be tolled or extended except by a court of competent jurisdiction." Only listed categories of comments enter the administrative record: comments received during the comment period, comments received at least 48 hours before a hearing or decision where no comment period applies, oral testimony at a noticed and recorded hearing, and, at a hearing or appeal on a CEQA determination, comments received at least 48 hours before it that raise issues which could not have been raised earlier because of significant project changes or new information. "All other public comments shall be disregarded and excluded from the administrative record."
In practice, a neighbor who waits until the city council hearing to submit a new written objection may find it excluded from the record; oral testimony at a noticed and recorded hearing is listed as part of the record, but how courts will treat issues raised only at that stage is not yet known. Under existing CEQA, Public Resources Code Section 21177 already requires most issues to be raised before the agency decides (see the exhaustion discussion on our zoning disputes page), and how courts would reconcile that rule with the new record limits is also open.
What a lawsuit could claim
Proposed Section 21026(b)(1) states that "a petitioner's claims shall be limited to a public agency's noncompliance with objective existing laws." "Objective" is defined as involving no personal or subjective judgment and being uniformly verifiable against an external and uniform benchmark or criterion knowable by both the applicant and the agency before the application was submitted. Under Section 21026(c)(1), "the court shall only determine whether the approval or authorization is supported by substantial evidence" in light of the whole record. Claims about public participation succeed only if the failure was arbitrary and capricious and caused prejudicial error.
How a court applies an "objective existing laws" limit to CEQA, a statute that calls for many judgment-based analyses, is an open question. No court has interpreted these provisions, and the outcome of the first cases is hard to predict.
Deadlines and the 270-day target
| Litigation step | Current CEQA | Prop 45, essential project (if approved) |
|---|---|---|
| File after notice of determination | 30 days (Pub. Resources Code Sec. 21167(b), (c), (e)) | 30 days (proposed Sec. 21027(a)(1)(A)) |
| File after notice of exemption | 35 days (Sec. 21167(d)) | 30 days (proposed Sec. 21027(a)(1)(A)) |
| Complete the case | No fixed statewide limit for most projects | "Within 270 days, inclusive of original and appellate court proceedings," with up to 90 more days by the court; any other extension requires consent of petitioner, agency and applicant |
The measure does not say when the 270 days begins or what happens if a court cannot finish in time. Proposition 45 also does not say what deadline applies when no notice is filed; existing Section 21167 generally allows 180 days in that situation, as summarized in the deadlines table in our builder's remedy article.
In Los Angeles County, local agencies file notices of determination, and any notices of exemption they choose to file, with the Los Angeles County Registrar-Recorder/County Clerk, and the filing date is what starts the clock. Check the county's posted CEQA notices rather than relying on the date of a city council vote.
What a court could order
Under proposed Section 21027(c), a court that finds a violation would issue a writ identifying the specific deficiency and the affected part, phase or activity. "The remedy shall be limited only to prohibiting commencement of the noncomplying part, phase, or activity" until the violation is corrected, and the court "may not order or direct" an agency to "rescind its approval or authorization of the essential project." Under Section 21027(e)(1), an injunction is available only on clear and convincing evidence of a specific, adverse public safety impact with no feasible mitigation, and only for that component.
That is a significant change for neighbors. Under current CEQA, the Legislative Analyst's Office notes, a court can halt an entire project. Under Proposition 45, the rest of the project could proceed while the noncompliant piece is fixed, and once the return to the writ is accepted, Section 21027(d) would bar further CEQA challenges to the project's implementation.
California law already places some limits on challenges to housing projects. A challenge to a qualifying housing project can carry bond exposure under Code of Civil Procedure Section 529.2, which we covered in our article on SB 1344 and housing project lawsuit bonds. For projects that fall under the Housing Accountability Act, our guide to builder's remedy lawsuits explains what neighbors can still challenge.
If Prop 45 passes, when does it take effect, and what happens to pending California projects?
An initiative statute takes effect on the fifth day after the California Secretary of State files the statement of the vote (Cal. Const., art. II, sec. 10(a)); the Secretary of State's calendar sets December 11, 2026 for certifying the statement of vote. Proposed Section 21033 would apply the measure on its effective date to "all pending and future" agency and judicial review of essential projects.
Pending applications
Under proposed Section 21014(f), an applicant with a pending application not yet finally approved may withdraw and resubmit after the effective date to use the new chapter. A resubmitted housing project keeps vested rights that relate back to its original preliminary application or vesting date. An application already deemed complete stays complete. Separately, proposed Section 21014(g) applies the new timelines to any application determined or deemed complete after the effective date, whenever it was submitted.
Pending lawsuits
Proposed Section 21026(a)(2) states that the litigation article applies to actions "pending on" or commenced after the effective date. A Los Angeles neighborhood group already in a CEQA suit against a project that qualifies as essential should expect the developer to argue that the new limits apply to the case. Whether the measure can change the rules for pending cases in every respect is likely to be litigated.
Can the Legislature change it?
Under proposed Section 21034, the Legislature could amend the chapter by a two-thirds vote of each house, and only if an amendment is consistent with the chapter and "furthers the purposes of" it. Proposed Section 21030 declares the subject a matter of statewide concern, which bears on whether charter cities such as Los Angeles may vary its procedures.
The fiscal estimate
The Legislative Analyst's Office estimates that initial state and local costs "likely would be in the high tens of millions of dollars annually, potentially exceeding $100 million annually," with fees paid by project applicants and people filing lawsuits partly covering them, and with uncertain longer-term effects that depend on how many projects are built.
What to do now
If you own property in California with a pending or planned project, or you are watching one go forward next door, the useful steps are the same either way the vote goes: keep a dated record of every notice, comment and hearing, submit comments in writing within the published comment period, and calendar every filing deadline from the date the notice is actually filed. Our zoning disputes practice represents owners, applicants and neighbors throughout California. If a notice has been filed, contact us with it in hand.
Common questions
What is California Proposition 45 on the November 2026 ballot?
Proposition 45, the Building an Affordable California Act, is an initiative statute that would add Public Resources Code Sections 21010 to 21034 to the California Environmental Quality Act. For essential housing, clean energy, water, public health, public safety, broadband, education facility and transportation projects whose applicants opt in, it would set review deadlines and narrow CEQA lawsuits. It does not exempt projects from environmental review.
Would Prop 45 stop neighbors from suing under CEQA in California?
No. Proposition 45 would not bar CEQA lawsuits. For an essential project whose applicant opts in, a suit would generally have to be filed within 30 days after the notice of determination or exemption is filed, claims would be limited to noncompliance with objective existing laws, and the case would be directed to be completed within 270 days including appeals.
Could a California court overturn a project approval under Prop 45?
Not by ordering the approval rescinded, if the applicant opted in. Under proposed Public Resources Code Section 21027(c), the court could only bar the specific noncompliant part, phase or activity from starting until the agency corrects the violation. An injunction would require clear and convincing evidence of a specific, adverse public safety impact with no feasible mitigation.
Does Prop 45 apply to housing projects in Los Angeles?
It could, if the project fits the measure's definition of essential housing and the applicant elects to use the new chapter. Unlike the 2025 infill housing exemption in Public Resources Code Section 21080.66, Proposition 45 does not require zoning consistency, an infill site or a maximum site size. It also does not change the zoning; it changes CEQA review and CEQA litigation.
When would Prop 45 take effect if voters approve it?
An initiative statute takes effect on the fifth day after the California Secretary of State files the statement of the vote, which the Secretary of State's calendar sets for December 11, 2026; the measure would take effect five days after that filing, not on the filing date itself. The measure states that it would then apply to all pending and future agency and judicial review of essential projects.
This article is general information about California law as of October 22, 2026 and is not legal advice. It does not create an attorney-client relationship. Anyone facing a specific dispute should consult a lawyer about their own circumstances.
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