Skagit County, WA Building Safety: Plumbing Permits (2026)

SCC 15.04.020(4) adopts the 2021 Edition of the IAPMO Uniform Plumbing Code, published by the International Association of Plumbing and Mechanical Officials, as the plumbing code for unincorporated Skagit County, together with Appendices A, B, I and M. The county does not adopt the Code's Chapters 12 and 14, and it drops the Uniform Plumbing Code's own venting and combustion-air rules for fuel-fired appliances in Chapter 5 as well as its provisions on building sewers, deferring instead to the county's separately adopted Mechanical and Fire Codes and its on-site sewage rules in SCC Chapter 12.48.

SCC 15.04.020(9) separately adopts the IAPMO Uniform Green Plumbing and Mechanical Code Supplement 2012 Appendix B for potable rainwater catchment systems. Permits for plumbing work follow Title 15's general permit-expiration rule as amended for stand-alone trades: under SCC 15.04.030(1)(d)4, a stand-alone mechanical, plumbing, or demolition permit expires and becomes void if the permitted work is not completed within six months of issuance, a shorter window than the three-year term given to a general building permit. Fees for plumbing permits are set under the Planning and Development Services fee schedule adopted by separate Board of Commissioners resolution, the same fee-setting mechanism SCC 15.04.030 uses for building permit fees generally.