What is the minimum width for a hallway in a home?
IRC §R311.6model code
Hallways must be at least 3 feet (36 inches) wide (IRC R311.6).
The IRC sets the minimum width of a hallway at 3 feet (36 inches).
This is a clear-width minimum. Trim, handrails, or other projections can cut into the usable space, so frame the opening to hold a full 36 inches clear.
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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.