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Maximum Stair Riser

 

 

The maximum stair riser can't be larger than 7 inches or smaller than 4 inches.

However, there are a couple of exceptions most single-family homes can have a maximum of 8 inches, with the exception of some newer building codes. It gets a bit confusing, but for the most part I would suggest a maximum riser height of 7 3/4", if possible, just to be safe.

Now where does the 7 inch maximum riser height come into play. This building code applies to most residential buildings with more than 50 occupants. Most building codes clearly state that an 8 inch maximum riser (except for the 2010 California building code, requiring a 7 3/4" maximum riser) is acceptable for buildings with less than 49 occupants.

If you're planning on building any stairs that aren't going to be for a private residence with less than 49 occupants, plan on using risers between 4 and 7 inches in height.

 

Attention: Don't forget to check with your local building department to verify any building codes on this website. This information could be incorrect or outdated. Building codes are updated regularly and to some building departments have different interpretations for certain building codes. 

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