Code Information / County and State Sites

Effective March 1, 2024, the State of Washington adopted the codes listed below. It is important that you are familiar with the codes prior to submitting an application in order to avoid unnecessary delays in processing your permit.

• 2021 I-Codes with Washington State Amendments 

• 2021 Washington State Energy Codes (WSEC)
  • 2021 Washington State Energy Code - Commercial (WSEC)
  • 2021 Washington State Energy Code - Residential (WSEC)
• 2021 Uniform Plumbing Code (UPC)
• Referenced Standards in 2021 International Mechanical Code
  • 2021 National Fuel Gas Code (NFPA 54)
  • 2021 Liquefied Petroleum Gas Code (NFPA 58)
• 2023 Washington Cities Electrical Code
• 2017 National Electrical Code (NFPA 70)
• 2021 Washington State-Wide Amendments
• 2021 International Swimming Pool and Spa Code (ISPSC)
• 2017 ICC A117.1 Accessible and Useable Buildings and Facilities

Replaced by Codes Noted Above

• 2018 I-Codes
• 2018 Washington State Energy Codes (WSEC)
• 2018 Washington State Energy Code - Commercial (WSEC)
• 2018 Washington State Energy Code - Residential (WSEC)
• 2018 Uniform Plumbing Code (UPC)
• Washington State Amendments to 2018 UPC
• 2018 National Fuel Gas Code (NFPA 54)
• 2017 Liquefied Petroleum Gas Code (NFPA 58)
• 2023 Washington Cities Electrical Code (Effective 4/1/2024)
• 2017 Washington Cities Electrical Code
• 2017 National Electrical Code (NFPA 70)
• 2018 Washington State-Wide Amendments
• 2018 International Swimming Pool and Spa Code (ISPSC)
• 2009 ICC A117.1 Accessible and Useable Buildings and Facilities