What height should a stair handrail be?
IRC §R311.7.8.1model code
Handrail height: 34 to 38 inches above the stair nosing (IRC R311.7.8.1).
Handrails on stairs must be between 34 and 38 inches (864–965 mm), measured vertically from the sloped plane of the stair nosings.
Handrails are generally required on at least one side of stairs with four or more risers.
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.