Washington State Adopts Appendix Q Tiny House

Effective Date Nov. 1st, 2020 Washington state has adopted  Appendix Q Tiny Houses, with amendments. The effective date is Nov. 1st, 2020. Appendix Q Tiny Houses was adopted into the 2018 International Residential Code ( IRC ) building code to provide regulations and standards for tiny homes on a foundation that is 400 square feet …

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