Building Codes

All are subject to Washington State amendments.

As of February 1, 2021, the following codes are in place:

See IMC Title 16.04 for City of Issaquah adopted codes and administrative amendments.

  • 2018 International Building Code - WAC 51-50
  • 2018 International Residential Code - WAC 51-51
  • 2018 International Fire Code - WAC 51-54A
  • 2018 International Existing Building Code - WAC 51-50
  • 2018 National Fuel Gas Code (NFPA 54) - WAC 51-50
  • 2018 International Mechanical Code - WAC 51-52
  • 2018 International Fuel Gas Code - WAC 51-52
  • 2017 Liquefied Petroleum Gas Code (NFPA 58) - WAC 51-52
  • 2018 Uniform Plumbing Code - WAC 51 –56
  • 2018 International Property Maintenance Code
  • 2018 International Swimming Pool and Spa Code
  • 2018 Washington State Energy code - WAC 51-11C and WAC 51-11R
  • 2009 ICC A117.1 Accessible and Usable Building and Facilities

View the State Building Code Council's site.

Permits accepted for review before February 1, 2021 will be reviewed under the 2015 code series. Please click on the following link for the full rulemaking page for the State Building Code Council.