California Gun Safe Requirements: DOJ Specs and Storage Penalties

A gun safe sold or used to satisfy California gun safe requirements must either meet the Department of Justice’s published construction specifications or hold a Residential Security Container certification from Underwriters Laboratories or an equivalent nationally recognized testing laboratory. Either path works. Smaller devices like trigger locks, cable locks, and lockboxes can also satisfy the state’s secure storage law, but only if the specific make and model appears on the DOJ’s Roster of Firearm Safety Devices.

The Two Compliance Paths

California gives safe manufacturers two routes. A safe can be built to the DOJ’s detailed construction checklist, which governs the lock, boltwork, walls, door, and hinges. Or it can skip that checklist entirely by earning a UL Residential Security Container rating from a certified testing lab.¹ Most consumer safes on the market are built to the DOJ specifications. When you shop, look for the manufacturer’s statement that the safe meets California DOJ standards or carries a UL RSC rating. Either is enough.

DOJ Construction Specifications

Lock and Boltwork

The safe must use a mechanical or electronic combination lock offering at least 10,000 possible combinations, built from a minimum of three numbers, letters, or symbols. The lock itself has to be shielded by a case-hardened, drill-resistant steel plate rated at Rockwell hardness 60 or higher.¹

Boltwork must include at least three steel locking bolts, each a minimum of half an inch thick, extending from the door into the body of the safe or from the body into the door. These bolts must be operated by a separate handle and secured by the lock.

Walls and Door

Wall thickness depends on construction. A single-walled safe needs exterior walls of at least 12-gauge steel. A double-walled safe needs combined steel thickness of at least 0.100 inches across the two layers. Doors have to be built from either one layer of 7-gauge steel with reinforced construction or two layers of at least 12-gauge steel in a compound design.¹

Hinges

Door hinges must be protected against removal. Acceptable approaches include interlocking door designs, dead bars, and concealed hinges. The point is that someone cannot pop the pins and lift the door off.

The UL Residential Security Container Alternative

A safe without the DOJ construction checklist still qualifies if it carries UL Residential Security Container certification from a nationally recognized testing laboratory.¹ UL technicians attack a sample safe under timed conditions using hand tools and power tools. The entry-level rating requires the safe to withstand a five-minute attack aimed at either opening the door or creating a four-inch opening in any surface. Higher UL ratings call for longer resistance against more aggressive tools.

Either certification path satisfies state law. You do not need both.

Smaller Devices on the DOJ Roster

Not every gun owner needs a full safe. Trigger locks, cable locks, and lockboxes can meet California’s secure storage requirement, but only if the exact make and model is listed on the California Department of Justice’s Roster of Firearm Safety Devices.² Selling an unlisted safety device is illegal in California, even for licensed dealers.

Manufacturers get on the roster by submitting their devices to a California-certified testing laboratory, which checks the device against DOJ safety and functionality standards. The roster is updated regularly, and the DOJ hosts a searchable version. Before buying, check that the specific model is currently listed.

A note on biometric safes. Many quick-access safes marketed to gun owners use fingerprint readers. These can fail from dirty sensors, dead batteries, or cut fingertips, and most biometric locks lack UL or equivalent certification. A biometric safe can still be legal in California if the overall unit sits on the DOJ roster or meets gun safe construction standards, but the fingerprint technology itself tends to be less reliable than a mechanical combination or electronic keypad.

Who Has to Use One

As of January 1, 2026, every person who possesses a firearm in a residence has to store it securely unless the firearm is being carried or readily controlled by the owner or another authorized user.³ This applies to every gun owner in the state. Senate Bill 53 made secure storage the default, not a rule triggered only by living with children or prohibited persons.

Penal Code 25145 defines “securely stored” as kept inside, locked by, or disabled using a DOJ-certified firearm safety device or a gun safe meeting DOJ standards.⁴ A gun sitting in an unlocked nightstand while you sleep in another room does not qualify. The only alternative to locked storage is keeping the firearm on your person or close enough to retrieve and control it immediately.

The older Penal Code 25100 rules on criminal storage still apply on top of this, with their own penalties for situations where a child or prohibited person gains access.⁴

Proving Safe Storage When You Buy a Gun

California verifies storage at the point of sale. When you complete a firearm purchase, you must either buy an approved safety device from the dealer at the time of transfer or prove you already own a qualifying one at home.

Since 2002, no firearm can be sold in California without being accompanied by an approved safety device, so the simplest route is buying one from the dealer during the transaction.² If you already own a listed lockbox or a qualifying gun safe, you can bring a purchase receipt along with a signed affidavit under penalty of perjury identifying the make and model and confirming it can accommodate the firearm you are buying.⁵ A parallel affidavit process exists for gun safe owners.

For handgun purchases, the dealer also walks you through a safe handling demonstration with the unloaded firearm and the device it will be delivered with before finishing the transfer.

Penalties

Residential Storage Violations

Simply keeping an unsecured firearm at home, without anyone being hurt and without a child or prohibited person getting hold of it, is now a misdemeanor under Penal Code 25135.³ This is the baseline penalty created by the 2026 universal rule.

Criminal Storage in the Third Degree

Third-degree criminal storage applies to negligent storage where no one is injured and the firearm is not taken off the premises. It is a misdemeanor.⁴

Criminal Storage in the Second Degree

Second-degree criminal storage applies when an unauthorized person accesses the firearm and either carries it to a public place or causes injury short of great bodily harm. It is a misdemeanor punishable by up to one year in county jail, a fine up to $1,000, or both.⁶

Criminal Storage in the First Degree

If you store a firearm negligently and an unauthorized person causes death or great bodily injury with it, you face first-degree criminal storage. The offense is a wobbler. A felony conviction carries 16 months, two years, or three years in state prison, a fine up to $10,000, or both. Charged as a misdemeanor, the maximum is one year in county jail, a fine up to $1,000, or both.⁶

1
State of California – Department of Justice – Office of the Attorney General. Regulatory Gun Safe Standards
2
State of California – Department of Justice – Office of the Attorney General. Roster of Firearm Safety Devices Certified for Sale
3
California Legislative Information. California Code Penal Code 25135
4
California Legislative Information. Penal Code PEN Chapter 2 – Criminal Storage of Firearm 25100-25145
5
Cornell Law School. Cal. Code Regs. Tit. 11, 4102 – Lock Box – Proof of Ownership of an Acceptable Lock Box Type Firearm Safety Device
6
Justia. California Code 25100-25130 – Penal Code