Framing & StructuralQuestion 379 of 700
Under the residential code, what is the MAXIMUM permitted riser height for a stairway serving a dwelling?
a.6 inches
b.7 inches
c.7 1/2 inches
d.7 3/4 inches
Explanation
The residential code caps riser height at 7 3/4 inches for stairs within dwellings. 6 and 7 inches are allowable but not the maximum; 7 1/2 inches is close but still below the code ceiling. Note the commercial building code uses a lower 7-inch maximum, so the value depends on occupancy.
Law Reference: 2025 CA Residential Code §R311.7.5Practice all 700 questions free — no signup required.
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