The following codes are adopted by reference subject to the amendments set forth in BIMC 15.04.021 through 15.04.050 and Resolution 99-31:
A. The International Building Code, 2021 Edition, published by the International Code Council, and amended by the State Building Code Council in Chapter 51-50 WAC, together with ICC A117.1, Appendix C (Agricultural Buildings), Appendix E (Supplementary Accessibility Requirements), Appendix J (Grading), and the 2021 International Existing Building Code;
B. The International Residential Code, 2021 Edition, published by the International Code Council, and amended by the State Building Code Council in Chapter 51-51 WAC together with Appendix F (Radon Control Measures), Appendix J (Existing Buildings and Structures), and Appendix Q (Tiny Homes);
C. The Uniform Plumbing Code, 2021 Edition, published by the International Association of Plumbing and Mechanical Officials, and amended by the State Building Code Council in Chapter 51-56 WAC including Appendices A, B, I and M;
D. The International Mechanical Code, 2021 Edition, published by the International Code Council, and amended by the State Building Code Council in Chapter 51-52 WAC; except that the standards for handling liquefied petroleum gas installations shall be NFPA 58 (Liquefied Petroleum Gas Code) and NFPA 54 (National Fuel Gas Code);
E. The International Energy Conservation Code, 2021 Edition, published by the State Building Code Council, and amended in Chapters 51-11C and 51-11R WAC;
F. The International Fuel Gas Code, 2021 Edition, published by the International Code Council;
G. The International Green Construction Code (IGCC), 2021 Edition, is adopted by reference as an optional alternative to the 2021 IBC and/or 2021 IRC;
H. The International Swimming Pool and Spa Code, 2021 Edition, published by the International Code Council.
In case of conflict among the BIMC and codes adopted in subsections A, B, C, D, E, F, G, and H of this section, the BIMC shall govern. (Ord. 2025-09 § 1, 2025; Ord. 2024-06 § 1, 2024; Ord. 2021-04 § 1, 2021; Ord. 2016-14 § 1, 2016: Ord. 2013-10 § 1, 2013: Ord. 2010-17 § 1, 2010: Ord. 2008-10 § 8, 2008: Ord. 2007-17 § 1, 2007: Ord. 2004-14 § 1, 2004: Ord. 98-30 § 2, 1998; Ord. 96-12 § 3, 1996; Ord. 93-20 § 1, 1993: Ord. 91-17 § 1, 1991; Ord. 89-46 § 1, 1989; Ord. 89-22 § 2, 1989; Ord. 87-27 § 1, 1987; Ord. 86-17 §§ 1, 2, 1986; Ord. 86-14 § 2, 1986: Ord. 86-06 § 1, 1986; Ord. 84-02 § 1, 1984: Ord. 81-07 § 1, 1981: Ord. 79-28 § 2, 1979)