Building Codes

All are subject to Washington State amendments.

As of July 1, 2016, the following codes are in place:

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

2015 International Building Code - WAC 51-50

2015 International Residential Code - WAC 51-51

2015 International Fire Code - WAC 51-54A

2015 International Mechanical Code - WAC 51-52

2015 International Fuel Gas Code - WAC 51-52

2014 Liquefied Petroleum Gas Code (NFPA 58) 

2015 Uniform Plumbing Code - WAC 51 –56 and WAC 51-57

2015 International Existing Building Code - WAC 51-50

2015 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.

The 2018 International Codes, along with the 2018 Uniform Plumbing code have been adopted by the State of Washington, but with an effective date of February 1, 2021. 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.