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Permitting services are available online via this website and For details and information about our new location and office hours, see our Customer Service Bulletin.

2018 new building codes

Starting February 1, 2021 the Washington State’s 2018 International Building Codes became effective. All permit applications received and deemed complete on or after that date shall comply with those codes. For information about future training and purchasing codebooks, see the Washington Association of Building Officials website.

  • International Building Code
  • International Residential Code
  • International Fire Code
  • International Mechanical Code
  • International Existing Building Code
  • International Property Maintenance Code
  • International Swimming Pool and Spa Code
  • Washington State Energy Code (the International Energy Conservation Code with Washington State amendments)
More information regarding these codes can be found on the following sites:

International Building Codes

Washington State Building Codes

King County Code

Sprinkler system

If property owners are preparing to submit building plans for a residential building permit, you need to determine if there is a need to install an automatic fire sprinkler system. A separate permit is required before installing a sprinkler system.

Fuel tanks

  • For information on fuel tank installing, relocating, or decommissioning, see Fuel Tanks
  • Apply for a fuel tank installation, relocation or decommission permit on

Department of Local Services, Permitting Division
919 SW Grady Way, Suite 300
Renton, WA  98057

Most of our staff members are working remotely. Most permitting services are available on this website and Beginning June 23, 2022, some in-person services will be available in our Renton office. For details, see our Customer Service Bulletin.

Ask us a question « Fill out our form to get a response

Customer service: call 206-296-6600 during the following hours: 9-11 a.m. and 12:30-2:30 p.m., Monday, Tuesday, Thursday, Friday.