What kind of door is required between an attached garage and the house?
A solid wood or solid/honeycomb-core steel door at least 1-3/8 inches thick, or a 20-minute fire-rated door - and it cannot open into a sleeping room (IRC R302.5.1).
A door connecting an attached garage to the residence must be one of three types: a solid wood door not less than 1-3/8 inches thick, a solid or honeycomb-core steel door not less than 1-3/8 inches thick, or a 20-minute fire-rated door.
Openings from the garage directly into a room used for sleeping purposes are not permitted.
Many jurisdictions (and newer code editions) also require this door to be self-closing and self-latching, so check your local amendments.
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Need this scoped to your jurisdiction?
Adopted edition and local amendments vary by city and county. Ask Donnie checks your jurisdiction and cites the exact adopted section.
Ask Donnie →General information based on the International Residential Code (a model code). This is AI assistance to verify — not legal advice. Confirm the adopted edition and any local amendments with your local building department (AHJ) and a licensed professional before you build.