The CEQA common sense exemption: Guidelines §15061(b)(3)
The CEQA common sense exemption, Guidelines §15061(b)(3), covers an activity only where “it can be seen with certainty that there is no possibility” it may have a significant effect on the environment. The agency relying on it must show that with evidence in the record, and any reasonable possibility of a significant effect defeats it.
The rule, word for word
Section 15061(b) lists the ways a project can be exempt: by statute, by a categorical class, by the common sense exemption, by being rejected, or under Article 12.5. Subdivision (b)(3) reads: “The activity is covered by the common sense exemption that CEQA applies only to projects which have the potential for causing a significant effect on the environment. Where it can be seen with certainty that there is no possibility that the activity in question may have a significant effect on the environment, the activity is not subject to CEQA.”
Before an amendment operative December 28, 2018, the same sentence began “covered by the general rule that CEQA applies only to projects…”, the wording quoted in Muzzy Ranch. The amendment gave the rule the name courts already used for it; the certainty and no-possibility test did not change.
How it differs from categorical and statutory exemptions
| Common sense, §15061(b)(3) | Categorical, §§15300–15333 | Statutory, PRC §21080(b) and others | |
|---|---|---|---|
| Where it comes from | The Guidelines, from the principle that CEQA covers only activities that could cause a significant effect | Classes the Secretary of the Natural Resources Agency found do not have a significant effect (PRC §21084(a)) | The Legislature; listed in Guidelines Article 18 |
| The test | Certainty that no significant effect is possible | The project fits the words of a class | The project fits the words of the statute and its conditions |
| §15300.2 exceptions | Not listed Its own test is stricter | Apply §15061(b)(2) | Don't apply §15061(b)(1) |
| Who proves what in court | The agency must show it applies, with record evidence (Muzzy Ranch) | The agency shows the project fits; a challenger must prove an exception (Berkeley Hillside, 2015) | The agency shows the project fits |
| A reasonable possibility of a significant effect | Defeats it | Not enough alone; it must come from unusual circumstances or another listed exception | Matters only if the statute makes it a condition |
What the courts require
Muzzy Ranch Co. v. Solano County Airport Land Use Com. (2007) 41 Cal.4th 372
The commission adopted a land use compatibility plan for the area around Travis Air Force Base and filed a notice that cited §15061(b)(3) and nothing else. The Supreme Court held that the exemption “can be relied on only if a factual evaluation of the agency's proposed activity reveals that it applies,” that the agency invoking it has the burden of showing it applies, and that an agency “obviously cannot declare ‘with certainty that there is no possibility’” of a significant effect “if it has not considered the facts of the matter.” Because opponents had raised legitimate questions, the commission had to cite substantial evidence.
The exemption still held. The record showed the plan “simply incorporates existing county general plan and zoning provisions concerning the maximum number of permitted dwelling units,” so it caused no change of its own. The court added that the finding “need not necessarily be preceded by detailed or extensive factfinding. Substantial evidence appropriate to the CEQA stage in issue is all that is required.”
Russian Riverkeeper v. County of Sonoma (2026) 122 Cal.App.5th 382
Sonoma County claimed the Class 7 and 8 exemptions and the common sense exemption for its 2023 amendments to its groundwater well permit ordinance. The First District, in an opinion filed August 4, 2026, affirmed the judgment setting the exemptions aside. Quoting earlier cases, it said “remote” or “outlandish” possibilities do not disqualify the exemption but “legitimate, reasonable questions” do, and that it is “reserved for those ‘obviously exempt’ projects.” The county assumed the amendments would mean fewer wells and less pumping; the record did not show it, so “regardless of the baseline, Sonoma offers no substantial evidence in support of the common sense exemption.” The court also held that the county's protective intent was not evidence for its exemptions.
Where it fits, and where it doesn't
- Fits: an action that changes nothing physical compared with existing conditions, such as a plan that restates limits already in the general plan and zoning (Muzzy Ranch).
- Doesn't fit: an action whose good effects depend on predictions the record doesn't support (Russian Riverkeeper), or one where comments raise reasonable questions the record leaves unanswered.
- Construction that fits a class: the categorical route puts the burden of proving an exception on the challenger, while the common sense route leaves the burden on the agency. See Class 1 for repairs and minor changes to existing facilities.
A checklist before relying on it
- Describe every physical change the activity could cause, directly or later, and the existing physical conditions it will be compared against.
- For each kind of effect (air, water, biology, cultural resources, noise, traffic and the rest), write down why none is possible and what shows it: a map, a permit record, measurements, or expert opinion supported by facts (§15384(b)).
- Answer every concern raised in comments. Argument, speculation and unsubstantiated opinion are not substantial evidence (§15384(a)), and neither is good intent.
- If a reasonable possibility of a significant effect remains, look for a categorical class that fits, checked against the §15300.2 exceptions, or start an initial study (§15063).
- In the Notice of Exemption, cite §15061(b)(3) and summarize the evidence in the reasons (§15062(a)(3)–(4)). The state's sample form has boxes for ministerial, emergency, categorical and statutory exemptions only, so write the citation in yourself. File after approval to start the 35-day clock; see how to file the notice.
- If a non-elected official or body made the call, expect that it can be appealed to the agency's elected body (§15061(e)).
Drafting the finding
Agency staff usually write the finding as a short memo kept with the file. ePlan's CEQA Exemption Finder drafts an exemption memo, a Notice of Exemption and a §15300.2 check from four answers, and an initial study checklist when nothing fits; reading the draft is free and the Word file costs $49. Its notice offers ministerial, emergency, categorical or statutory status, not the common sense exemption, so a common sense finding means editing the draft, and the evidence still has to come from your record. The lead agency decides whether any exemption applies.
Sources
- CEQA Guidelines §15061, Review for exemption, including the history note for the 2018 amendment of (b)(3) (14 CCR; read November 13, 2026)
- CEQA Guidelines §15384, Substantial evidence and §15063, Initial study (read November 13, 2026)
- Public Resources Code §21084 (text mirrored from leginfo.legislature.ca.gov; read November 13, 2026)
- Muzzy Ranch Co. v. Solano County Airport Land Use Com. (2007) 41 Cal.4th 372 (read November 13, 2026)
- Russian Riverkeeper v. County of Sonoma (2026) 122 Cal.App.5th 382, Court of Appeal, First District, Division Two, A172760, filed August 4, 2026 (read November 13, 2026)
- Berkeley Hillside Preservation v. City of Berkeley (2015) 60 Cal.4th 1086 (read November 13, 2026)
- ePlan CEQA Exemption Finder and pricing page (read November 13, 2026)
About this guide
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