Appendix Q Tiny Houses was approved for inclusion in the 2018 International Residential Code ( IRC ) building code to provide regulations and standards for tiny houses on a foundation that is 400 square feet or less.
Appendix Q relaxes various requirements in the body of the code as they apply to tiny houses that are 400 square feet or less.
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Attention is specifically paid to features such as compact stairs, including hand rails and headroom, ladders, reduced ceiling heights in lofts and guard and emergency escape and rescue opening requirements of lofts.
The International Residential Code is a comprehensive, stand alone residential code that creates minimum regulations for one-and two family dwellings of three stories or less
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