Purchasing Code Books Official Codes Effective July 1, 2007, the state of Washington enforces the codes listed below.  It is important that you become familiar with the new International Codes prior to submitting an application in order to avoid unnecessary delays in processing your permit. 2006 International Building Code (IBC) 2006 International Residential Code (IRC) 2006 International Mechanical Code (IMC) 2006 International Fuel Gas Code (IFGC) 2006 International Fire Code (IFC) 2006 Washington State Energy Code, WAC 51-11 (WSEC) 2006 Washington State Ventilation and Indoor Air Quality Code, WAC 51-13 (VIAQ) 2006 Uniform Plumbing Code (UPC) 2006 National Fuel Gas Code (NFPA 54) 2004 Liquefied Petroleum Gas Code (NFPA 58) 2005 National Electrical Code (NEC)  [Bellevue, Kirkland, Mercer Island] 2006 Washington State-Wide Amendments State of Washington Amendments to the codes can be viewed through the State Building Code Council . The State amendments to the NEC can be viewed at  Publication 296-46B. Purchasing Code Books Code books are available for purchase in Bellevue at the International Code Council office, 2122 112th Ave. NE, Suite C.  Their phone number is 425-451-9541.  They also ship books to the University Bookstores, both the Seattle and Bellevue branches. Code books can be purchased on-line at these locations: International Code Council Washington Association of Building Officials (WABO).  You can reach the WABO Bookstore at 360-586-6725, 888-664-9515 (toll free), or 360-586-5538 (fax). In addition, copies of these codes can be viewed at each city’s building department location and at the King County public libraries. When using an electronic database to "search" for these, we recommend that you use key words such as "Code," "Building Codes," or more specific key identifying names.