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Building Code Reference

Got a CRC R302.5 correction?

Garage-to-house door fire rating

For builders in California, Greater Seattle, the Las Vegas area, the Denver area and Kansas City · CrossBeam Permits

What this code requires, how to fix it, and how cities and counties review it

What this code requires

CRC R302.5 is the California Residential Code section governing openings in the fire separation between an attached garage and the living space of a house. Any door between the garage and the home must be solid wood at least 1-3/8 inches thick, solid or honeycomb-core steel at least 1-3/8 inches thick, or a 20-minute fire-rated door assembly. The door also requires self-closing and self-latching hardware. Direct openings into a bedroom are not allowed under this section.

How to fix it

  1. Add a door schedule entry that calls out R302.5 compliance

    On your floor plan or in a door schedule sheet, label the garage-to-house door with all three required details: (1) door type and material, (2) thickness in inches, and (3) hardware. A note like 'DR-2: Solid wood, 1-3/8" min. thick, self-closing, self-latching per CRC R302.5' satisfies most plan-checkers in one line. If you're using a full door schedule with a table, add a 'Code Compliance' column and fill it in for every exterior and separation door. That way the garage entry stands out and the checker doesn't have to cross-reference multiple sheets to confirm it.

  2. Specify an approved door type: solid wood, solid steel, or 20-minute rated

    Three door types satisfy CRC R302.5: (1) solid wood at 1-3/8 inches thick minimum — the species isn't restricted, so pine, fir, and LVL all qualify as long as the thickness is met; (2) solid or honeycomb-core steel at 1-3/8 inches thick minimum; (3) a listed 20-minute fire-rated door assembly. If you're not sure which option you're using, the safest call for most residential projects is a 20-minute labeled door. That label removes all ambiguity at inspection and makes the plan-checker's job straightforward. Budget around $150-$350 for a standard 20-minute residential door assembly at lumber yards in Orange County.

  3. Call out self-closing and self-latching hardware explicitly

    Both self-closing and self-latching devices are required. A standard spring hinge or door closer satisfies self-closing. A passage latch that catches on its own satisfies self-latching; a deadbolt that must be thrown by hand does not. Call these out in your hardware schedule or on the door schedule note — don't rely on the inspector to assume the hardware is correct. Most contractors write 'self-closing door closer + passage latch per CRC R302.5' next to the door number, and that clears the correction. The closer and latch must work together: the door has to pull itself fully shut and latch without anyone touching it. If the closer is adjusted too loosely to fully engage the latch, that fails at rough-frame inspection.

  4. Confirm the garage door does not open directly into a bedroom

    CRC R302.5 prohibits any opening from the garage directly into a room used for sleeping. If your floor plan shows the garage door entering a room labeled 'office,' 'bonus room,' or anything that could be interpreted as a sleeping space, the plan-checker will flag it. The fix is either to relabel the room if it genuinely isn't a bedroom, or to redesign the entry path so it passes through a hallway or utility space first. On ADU plans, this comes up when the garage conversion includes a sleeping loft accessible only through the garage level. Check every room label adjacent to the garage wall, not just the primary entry point.

  5. Cross-check R302.6 on the same sheet to avoid a second correction

    CRC R302.6 requires the garage ceiling and walls shared with the living space to be covered with 1/2-inch gypsum wallboard minimum. When plan-checkers flag R302.5 for the door, they usually check R302.6 at the same time. Save yourself a second correction letter by confirming that both the door note and the drywall note appear on the same plan sheet. A single fire-separation compliance block referencing R302.5 (door) and R302.6 (assembly) on your wall section or floor plan will satisfy both items in one review cycle. Many contractors add this block to the general notes sheet so it's visible on every set.

  6. Write a clear response letter when resubmitting

    When you resubmit, include a response letter that references the original correction item number and states specifically what was changed. Something like: 'Correction #4 — Garage entry door updated to 20-minute fire-rated assembly with self-closing door closer and passage latch per CRC R302.5. See revised Door Schedule, Sheet A3, Door DR-2.' Plan-checkers review dozens of resubmittals; pointing them directly to the sheet and door number cuts turnaround time. If the project is in Anaheim, Building Division staff sometimes request a manufacturer cut sheet for the door assembly — keep the product spec sheet ready so you can email it the same day they ask.

Take the CRC R302.5 fix steps with you

All 6 steps in one email, so you have them on site instead of on this page.

Why you got flagged

Corrections letters cite CRC R302.5 for a handful of specific reasons, and they almost always point back to what’s shown on the plans rather than what’s built.

The most common reason is a missing or vague door specification on the floor plan. If the garage-to-house door is labeled “WD” or “solid core” without stating the thickness, species, or fire rating, a plan-checker has no way to confirm it meets the 1-3/8-inch minimum. That gets you a correction asking for a door schedule or a note that explicitly calls out conformance with R302.5. When the door schedule shows up blank or with generic notes, plan-checkers mark it as unresolved and the project sits.

The second common trigger is a hollow-core door. Lots of contractors spec hollow-core interior doors throughout a house and accidentally include the garage entry in that same door schedule. Hollow-core doors don’t meet the code requirement — a plan-checker will catch it even if it looks like an oversight rather than an intentional call.

Hardware often gets missed entirely. Specifying the right door doesn’t automatically satisfy R302.5 if the self-closing and self-latching devices aren’t noted on the hardware schedule or door schedule. Plan-checkers look for both the door type and the hardware type. Omitting the hardware note is its own flag, separate from the door material.

Bedroom access is a fourth flagged scenario. If a floor plan shows a door from the garage that opens directly into a bedroom — especially in ADUs, guest suites, or converted bonus rooms — the plan-checker will cite R302.5 and likely also R302.5.1. This comes up on remodel permits where the layout was altered and the new bedroom happens to share a wall with the garage.

The official code

California Residential Code R302.5 — Dwelling Unit Garage Opening and Penetration Protection (2025)

Read the source →

Common questions

Does CRC R302.5 apply to a garage-to-ADU door on a converted garage project?
Yes. If the ADU is attached to the main house and the garage shares a wall with the ADU living area, the connecting door must meet R302.5. This is one of the most common correction triggers on ADU permits, particularly garage conversions in Orange County. The door must be solid wood or solid/honeycomb-core steel at 1-3/8 inches thick minimum, or a 20-minute fire-rated assembly, with both self-closing and self-latching hardware. No direct opening into the sleeping area is permitted. On garage conversions where the original garage door bay is being enclosed, contractors sometimes add a new interior door without specifying the type — that gets flagged immediately on plan check.
Does a hollow-core door with a self-closer pass CRC R302.5?
No. A hollow-core door does not satisfy R302.5 regardless of the hardware installed on it. The code requires solid wood at 1-3/8 inches thick minimum, solid or honeycomb-core steel at 1-3/8 inches thick minimum, or a 20-minute fire-rated assembly. Standard interior hollow-core slabs — the kind used in most bedrooms and closets — don't meet any of those three thresholds. Adding a spring hinge or door closer doesn't change the door core material. If your plans call out a hollow-core door on the garage entry, revise the door schedule to a solid-core or fire-rated unit before resubmitting. The correction letter will point directly at the door schedule if it shows hollow-core.
What hardware counts as self-closing and self-latching under R302.5?
Self-closing means the door returns to the closed position on its own without anyone pushing it. A hydraulic or pneumatic door closer, spring hinges, or a cam-rise hinge all qualify. Self-latching means the latch engages the door frame automatically when the door closes — a standard passage latch or deadbolt works as long as it catches without manual operation. Both must work together: if the closer pulls the door most of the way shut but the latch doesn't catch, that fails rough-frame inspection. Most plan-checkers want both devices named on the door schedule so there's no ambiguity. A note like 'door closer + passage latch, self-closing/self-latching per R302.5' on the door legend is usually enough.
Can the garage door open directly into a bathroom or laundry room?
CRC R302.5 specifically prohibits direct openings into a bedroom. Laundry rooms, mudrooms, hallways, and utility spaces are permitted entry points. Bathrooms are not explicitly named in R302.5 itself, but some local jurisdictions flag bathroom entries as well. If you're routing the garage door into a bathroom, check with your local building department before finalizing the plan. The safest design is a short hallway or utility corridor between the garage entry and the rest of the house — this sidesteps any bedroom prohibition and eliminates gray-area questions about bathrooms. On ADU permits where the layout is tight, even a 3-foot by 4-foot vestibule satisfies the separation intent.
Is a 1-3/8 inch solid-core composite door the same as solid wood for R302.5?
It depends on the core material. CRC R302.5 requires solid wood, meaning the core is solid wood fiber. Dense composite cores made from wood fiber and binder generally satisfy the intent, but the plans should still call out the core material explicitly so the plan-checker doesn't have to guess. True particleboard or hollow-particle cores don't satisfy R302.5. If you want to remove all ambiguity, spec a 20-minute fire-rated door assembly instead. These are clearly labeled by the manufacturer, the label is visible at inspection, and there's no back-and-forth about what's inside the core. Most lumber yards in Orange County stock standard residential 20-minute assemblies in common sizes.
Does CRC R302.5 apply to a detached garage?
No. CRC R302.5 governs openings in the fire separation wall between an attached garage and the dwelling. A detached garage that has no structural connection to the house is covered by different separation requirements based on its distance from the main structure and the property line, not by R302.5. However, if a covered passageway or breezeway connects the detached structure to the house, some jurisdictions treat that connection as an attachment and apply R302.5 to the connecting door. Check with your local plan department before finalizing the design if there's any physical connection between a nominally detached garage and the dwelling.

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