Washington Building and Residential Codes

The State Building Code Council (SBCC) was created to advise the Legislature on building code issues and to develop the building codes used in Washington.  Every three years new model codes are published by the International Code Council (ICC).  The SBCCs Technical Advisory Groups (TAGs) review and adopt these new editions.  The TAGs review any changes proposed to the new editions, or to the pre-existing state amendments.

The 2018 International Building Code (including the 2018 International Existing Building Code and 2009 ICC/ANSI A117.1) and the 2018 International Residential Code, with Washington State Amendments, went into effect in Washington on February 21, 2021.

Building Code Compliance Software for Washington

Plan Analyst code compliance software programs make it easy for building officials, architects and other designers to quickly perform commercial and residential building code plan reviews / code studies.  Plan Analyst for the 2018 IBC and Plan Analyst for the 2018 IRC simplifies the plan review / code study process enabling compliance to specific code years.  This proven software allows modifications to accommodate local amendments, where applicable.  Users have the ability to add code requirements and to add to the checklist.  Changes can be made permanent by changing the data file using the setup section of Plan Analyst, or specific reports can be edited for special conditions.

Plan Analyst Calculators: Deck – Sign – Beam & Column

Plan Analyst Deck, Sign and Beam & Column Calculators are additional simple and effective design and code review software tools that will quickly become your go-to resources when working on associated tasks.

Users of Plan Analyst in Washington have included:

Benton CountyA2E Inc.
City of Airway HeightsBay View Construction Inc
City of Moses LakeBHC Consultants
City of ProsserBondeson’s Building Design
City of YakimaEagle Signs
City of ZillanKing Architecture LLC
Spokane CountyQuality Sign Service, Inc.
City of SpokaneP&L General Contractors Inc.

Building and Residential Code Resources in Washington

Energy Code Compliance Software for Washington

Visit the U.S. Department of Energy website to see the latest on energy code adoption in Washington, including the use of COMcheck and REScheck Energy Code compliance software. COMcheck enables architects, builders, designers, and contractors to determine whether new commercial or high-rise residential buildings, additions, and alterations meet the requirements of the IECC and ASHRAE Standard 90.1.  REScheck product enables builders, designers, and contractors to determine whether new homes, additions, and alterations meet the requirements of the IECC or a number of state energy codes.

The “Building Codes Assistance Project” also provides information on Washington’s building energy codes.

FEMA Building Code Adoption Tracking

The FEMA Building Code Adoption Tracking program reports on the status of hazard-resistant building code adoption in each state. Washington is in FEMA Region 10. Read the 2023 Region 10 fact sheet showing the annual metric of the percent of communities adopting hazard-resistant building codes in Washington.


American Institute of Architects  – AIA Washington represents architects in the state.  There are over 6,000 registered and reciprocal architects in Washington.

Several ICC Chapters operate in Washington

Washington code adoption status on the ICC website