Heads you appeal, tails you writ: California's asymmetric appealability rules.
One of the least intuitive features of California appellate procedure is that the appealability of an order often depends not on what was decided, but on which way it was decided. Grant a motion, and the losing party has an appeal of right. Deny the very same motion, and the losing party's only immediate remedy is a discretionary writ — or nothing at all until final judgment. Miss the distinction and you can lose your review rights entirely.
Below is a catalog of the major asymmetries under California law, followed by the principle that explains them and the calendaring traps they create.
The asymmetric orders
1. Motion for new trial
An order granting a new trial is immediately appealable. (Code Civ. Proc., § 904.1, subd. (a)(4).) An order denying a new trial is not appealable at all; the ruling is reviewable only on appeal from the underlying judgment. (Walker v. Los Angeles County Metropolitan Transportation Authority (2005) 35 Cal.4th 15, 18.) The denial does, however, extend the time to appeal the judgment. (Cal. Rules of Court, rule 8.108(b).)
2. Motion to quash service of summons
An order granting a motion to quash is appealable. (§ 904.1, subd. (a)(3).) An order denying the motion is reviewable only by petition for writ of mandate filed within 10 days after service of written notice of entry of the order (extendable up to 20 additional days for good cause) — and the writ is the exclusive means of pretrial review. (§ 418.10, subd. (c).)
3. Forum non conveniens
Same statute, same split: an order granting a motion to stay or dismiss for inconvenient forum is appealable (§ 904.1, subd. (a)(3)), while an order denying the motion is reviewable only by statutory writ under section 418.10, subdivision (c).
4. Petition to compel arbitration
An order denying or dismissing a petition to compel arbitration is immediately appealable. (§ 1294, subd. (a).) An order granting the petition is not — the objecting party must proceed through arbitration and seek review on appeal from the judgment confirming the award, or attempt an interlocutory writ. Note that since January 1, 2024 (SB 365), perfecting an appeal from an order denying arbitration no longer automatically stays trial court proceedings.
5. Class certification — the death knell doctrine
An order denying class certification (or decertifying a class) is appealable under the death knell doctrine when it effectively terminates all class claims while individual claims survive. (In re Baycol Cases I & II (2011) 51 Cal.4th 751.) An order granting certification is reviewable only by discretionary writ or on appeal from the final judgment. Two caveats: the death knell appeal is mandatory, not optional — fail to take it and the class claims are gone (Baycol) — and the doctrine does not apply where representative PAGA claims remain pending, because a possibility of group recovery survives.
6. Summary judgment
A granted motion ripens into an appealable judgment. A denied motion is not appealable; review is by petition for writ of mandate within 20 days of notice of entry (extendable to 30). (§ 437c, subd. (m)(1).)
7. Right to attach orders
Section 904.1, subdivision (a)(5) makes appealable an order "granting a right to attach order" — and orders discharging or refusing to discharge an attachment — but conspicuously omits orders denying a right to attach order. The disappointed creditor's remedy is a writ petition or a renewed application.
8. Leave to intervene
An order denying leave to intervene is appealable because it finally and adversely disposes of the would-be intervenor's right to participate — as to that party, it is the end of the case. An order granting intervention is not separately appealable; the objecting party must await final judgment.
9. Demurrers
The everyday version of the same rule: an order overruling a demurrer is never directly appealable — the defendant answers and litigates. An order sustaining a demurrer without leave to amend becomes reviewable on appeal from the ensuing judgment of dismissal.
Quick reference
| Order | Granted | Denied |
|---|---|---|
| New trial | Appealable (§ 904.1(a)(4)) | Not appealable; review on appeal from judgment |
| Motion to quash service | Appealable (§ 904.1(a)(3)) | 10-day statutory writ only (§ 418.10(c)) |
| Forum non conveniens | Appealable (§ 904.1(a)(3)) | Statutory writ only (§ 418.10(c)) |
| Compel arbitration | Not appealable; writ or post-award appeal | Appealable (§ 1294(a)) |
| Class certification | Writ or post-judgment review | Appealable if death knell (Baycol) |
| Summary judgment | Appealable judgment | 20-day writ (§ 437c(m)(1)) |
| Right to attach order | Appealable (§ 904.1(a)(5)) | Writ only |
| Leave to intervene | Not separately appealable | Appealable (final as to intervenor) |
| Demurrer | (Sustained w/o leave) appealable after dismissal | (Overruled) not appealable |
The principle behind the asymmetry
These rules look arbitrary until you see the thread: appealability tracks finality, not importance. Under the one final judgment rule codified in section 904.1, an order is appealable when it ends the litigation — for everyone, or at least for someone. An order granting a new trial wipes out a judgment; an order granting a motion to quash ends the California case; an order denying arbitration forecloses the arbitral forum for good; a death knell order is the "practical equivalent of a final judgment" for the absent class. Each terminates something that cannot be effectively reviewed later.
The mirror-image rulings — denying a new trial, denying a motion to quash, granting arbitration, granting certification — all keep the case moving. The aggrieved party will have its day in the Court of Appeal after judgment, so the Legislature channels any interim review into discretionary or short-fuse statutory writs. Piecemeal appeals are the enemy; asymmetry is the design, not a drafting accident.
The Legislature knows how to make appealability symmetric when it wants to. Anti-SLAPP orders are appealable whether granted or denied (§§ 425.16, subd. (i), 904.1, subd. (a)(13)) — a deliberate policy choice to protect the immunity from suit in both directions. And the Supreme Court resolved a longstanding split in Ryan v. Rosenfeld (2017) 3 Cal.5th 124 by holding that the denial of a section 663 motion to vacate is appealable as a postjudgment order — proving that where an order follows a final judgment, the finality logic no longer demands asymmetry.
Practice pointers
The asymmetries generate the most dangerous deadlines in California civil practice. The 10-day writ window after denial of a motion to quash and the 20-day window after denial of summary judgment are among the shortest in the codes, and neither is preserved by waiting for judgment in any meaningful sense — the MSJ denial can be raised post-judgment only in limited circumstances, and the jurisdictional objection is far weaker later. Conversely, when your opponent's motion is granted and the order is appealable, the ordinary 60-day clock under rule 8.104 starts running immediately; treating a granted new trial or quash order as something to deal with "after judgment" forfeits the appeal. And in the class context, Baycol makes the death knell appeal compulsory — a plaintiff who litigates the individual claims to judgment first has forfeited review of the certification denial.
When in doubt, ask the finality question: did this order end the case for anyone? If yes, look for an appeal deadline. If no, look for a writ deadline. Either way, look quickly.
What this post is not. This post is attorney advertising and does not constitute legal advice. Reading it does not create an attorney-client relationship. If you are weighing an appeal or writ petition from a California order — appealable or otherwise — talk to appellate counsel about your facts, and quickly.
Gelb Law APC is a Beverly Hills litigation and appellate boutique. Yisrael Gelb · yisrael@gelblawapc.com · (323) 632-6864