Building Permits and Codes

The Building division has the responsibility of administering the building related codes. The primary duties of the department include the issuance of building, mechanical, and plumbing permits for all new and existing construction as well as project plan review and field inspection for all phases of construction.

The City accepts building permit applications digitally through

24-Hour Inspection Request Line

  • 425-338-1133
  • Call by 4 p.m. and receive an inspection the next business day 
  • Call after 4 p.m. and an inspection will be scheduled the following business day
  • Link to online inspection requests

Adopted Codes
Building Codes adopted by the City of Mill Creek as of 7/1/2016, as amended by the State of Washington Building Code Council (SBCC):

2015 International Building Code
2015 International Residential Code
2015 International Mechanical Code
2015 International Fuel Gas Code
2015 International Fire Code
2015 International Existing Building Code
2015 Uniform Plumbing Code
Residential Energy Code Info
WA State Amendments to ICC Codes as applicable
National Electrical Code: Electrical permits administered by the WA State Dept. of L & I

Design Criteria for Mill Creek

Ground Snow Load 25 psf
Seismic Design Category D1
Wind Speed 110mph
Wind Exposure B & C
Minimum Frost Depth 12 inches

Quick Links

Architect / Engineer License Status
Call Before You Dig
Construction Tip Sheets
Do I Need a Permit?
Energy Code Questions
International Code Council
Licensed Contractors
Washington Association of Building Officials
When Building Permits are Required