California Gun Safe Requirements: DOJ Specs, UL Alternative, Penalties

California’s gun safe requirements give manufacturers two ways to build a compliant safe: meet the Department of Justice’s detailed construction specifications, or earn a Underwriters Laboratories Residential Security Container certification from a nationally recognized testing laboratory.¹ Either path satisfies the state’s secure storage law, which as of January 1, 2026, applies to every firearm kept in a California home.²

DOJ Construction Specifications for Gun Safes

The DOJ specifications cover the lock, the boltwork, and the steel that surrounds them. A safe built to these standards must pass on every point, not just most of them.

Lock and Relocker

The safe must use a mechanical or electronic combination lock offering at least 10,000 possible combinations using a minimum of three numbers, letters, or symbols. A case-hardened, drill-resistant steel plate rated at Rockwell hardness 60 or higher must sit between the outside world and the lock body to defeat drill attacks.¹

Boltwork

The door must be held shut by at least three steel locking bolts, each a minimum of half an inch thick, extending from the door into the safe body or from the body into the door. The bolts have to be driven by a separate handle and held in place by the lock itself, not by the handle mechanism alone.¹

Walls and Door

A single-walled safe needs exterior walls of at least 12-gauge steel. A double-walled safe qualifies if the combined thickness of its two steel layers reaches at least 0.100 inches. The door is held to a higher standard: either one layer of 7-gauge steel with reinforced construction, or two layers of at least 12-gauge steel in a compound design.¹

Hinge Protection

Door hinges must be protected against removal. Acceptable designs include interlocking door construction that keeps the door in place even if the hinge pins are cut, dead bars that engage the frame on the hinge side, or hinges concealed inside the safe body.¹

The UL Residential Security Container Alternative

A safe that does not follow the DOJ construction checklist can still comply if it is certified to meet Underwriters Laboratories Residential Security Container standards by a nationally recognized testing laboratory. UL testing is destructive: trained technicians attack production samples with hand tools and power tools under timed conditions. The entry-level UL rating requires the safe to resist a five-minute attack aimed at opening the door or creating a four-inch opening in any surface. Higher ratings extend the attack time and expand the tool list.¹

For a buyer, the practical difference is what you check. A DOJ-spec safe should be marketed as meeting California’s construction requirements; a UL-certified safe will carry a UL Residential Security Container label from the testing lab.

Approved Firearm Safety Devices as an Alternative

A full safe is not the only compliant option. Under Penal Code 25145, a firearm is securely stored if it is maintained within, locked by, or disabled using either a DOJ-certified firearm safety device or a qualifying gun safe.³ Trigger locks, cable locks, and lockboxes qualify when the specific make and model appears on the California Department of Justice’s Roster of Firearm Safety Devices. Selling a safety device that is not on the roster is illegal for anyone, including licensed dealers.⁴

Manufacturers put their devices through a California-certified testing laboratory to confirm the product meets DOJ safety and functionality standards before listing. The roster updates regularly, and the DOJ website lets you search by make and model to confirm current approval before you buy.

A note on biometric locks. Many quick-access safes marketed to gun owners use fingerprint scanners, which can fail from dirty sensors, dead batteries, or damaged fingertips, and most biometric locks lack UL or equivalent certification. A biometric unit can still comply if the overall safe or lockbox appears on the DOJ roster or meets the construction standards, but the fingerprint reader itself is generally less reliable than a mechanical dial or electronic keypad.

Who Has to Store Firearms Securely at Home

Since January 1, 2026, any person who possesses a firearm in a residence must keep it securely stored unless it is being carried or readily controlled by the owner or another authorized user.² The rule applies to every gun owner in the state, not just those who live with children or people barred from possessing firearms.

The older provision, Penal Code 25100, remains in force and carries its own penalties when a child under 18 or a prohibited person gets access to an improperly stored gun.³ What changed in 2026 is that even a gun owner living alone must now use a compliant safe, rostered device, or ready-control arrangement for every firearm at home. A pistol in an unlocked nightstand while you sleep in another room does not meet the standard.

Proving Safe Storage When Buying a Firearm

California builds storage verification into the point of sale. When you complete a firearm purchase, you must show the dealer how the gun will be stored, using one of two methods.

The first is to buy an approved safety device at the dealer. Purchasing a DOJ-rostered trigger lock, cable lock, or other listed device at the time of transfer satisfies the requirement, and since 2002 no firearm can be sold in California without an approved safety device accompanying it.⁴

The second is to prove you already own a qualifying storage solution. For a lockbox, that means giving the dealer a purchase receipt for a rostered device and a signed affidavit, under penalty of perjury, stating the make and model and confirming it can accommodate the firearm you are buying. A parallel affidavit process applies to gun safe owners.⁵

For handguns, the dealer must also walk you through a safe handling demonstration with the unloaded firearm and its accompanying safety device before finishing the transfer.

Penalties for Improper Storage

California grades storage crimes by the harm that follows unauthorized access.

First-Degree Criminal Storage

If you store a firearm negligently and an unauthorized person, whether a child or a prohibited person, causes death or great bodily injury with it, the charge is first-degree criminal storage. This is a wobbler: the prosecutor can file it as a felony or a misdemeanor. A felony conviction carries 16 months, two years, or three years in state prison, a fine up to $10,000, or both. A misdemeanor conviction carries up to one year in county jail, a fine up to $1,000, or both.⁶

Second-Degree Criminal Storage

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

Third-Degree Criminal Storage

Third-degree criminal storage covers negligent storage situations where no one is injured and the firearm never leaves the premises. It is a misdemeanor.³

Violating the Residential Storage Requirement

The 2026 universal storage obligation under Penal Code 25135 carries its own penalty. Keeping an unsecured firearm at home, without any of the triggering events under Section 25100, is a misdemeanor on its own.²

1
State of California – Department of Justice – Office of the Attorney General. Regulatory Gun Safe Standards
2
California Legislative Information. California Code Penal Code 25135
3
California Legislative Information. Penal Code PEN Chapter 2 – Criminal Storage of Firearm 25100-25145
4
State of California – Department of Justice – Office of the Attorney General. Roster of Firearm Safety Devices Certified for Sale
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